simplify "a = a +" to "a +="

mostly so that my stringadd loplugin can point out places to improve

Change-Id: I9920ee1c99cdb6b811ba67ff9d8e32aa261884b5
Reviewed-on: https://gerrit.libreoffice.org/80618
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>

58 files changed, 184 insertions, 208 deletions

diff --git a/accessibility/source/standard/accessiblemenuitemcomponent.cxx b/accessibility/source/standard/accessiblemenuitemcomponent.cxx
index 1e1499734e9b..7160944ebf72 100644
--- a/accessibility/source/standard/accessiblemenuitemcomponent.cxx
+++ b/accessibility/source/standard/accessiblemenuitemcomponent.cxx
@@ -189,7 +189,7 @@ OUString OAccessibleMenuItemComponent::GetAccessibleName()
         sName = OutputDevice::GetNonMnemonicString( sName );
 #if defined(_WIN32)
         if ( m_pParent->GetAccelKey( nItemId ).GetName().getLength() )
-            sName = sName + "\t" + m_pParent->GetAccelKey(nItemId).GetName();
+            sName += "\t" + m_pParent->GetAccelKey(nItemId).GetName();
 #endif
     }
 
diff --git a/basic/source/classes/sbxmod.cxx b/basic/source/classes/sbxmod.cxx
index 72811562ac92..0e93da321ccd 100644
--- a/basic/source/classes/sbxmod.cxx
+++ b/basic/source/classes/sbxmod.cxx
@@ -2565,7 +2565,7 @@ void SbUserFormModule::InitObject()
             }
             catch(const Exception& ) {}
 
-            sDialogUrl = sDialogUrl + sProjectName + "." + GetName() + "?location=document";
+            sDialogUrl += sProjectName + "." + GetName() + "?location=document";
 
             uno::Reference< awt::XDialogProvider > xProvider = awt::DialogProvider::createWithModel( xContext, m_xModel  );
             m_xDialog = xProvider->createDialog( sDialogUrl );
diff --git a/basic/source/runtime/iosys.cxx b/basic/source/runtime/iosys.cxx
index cf433052014c..6797b41f7758 100644
--- a/basic/source/runtime/iosys.cxx
+++ b/basic/source/runtime/iosys.cxx
@@ -535,7 +535,7 @@ ErrCode const & SbiStream::Read( char& ch )
     if (aLine.isEmpty())
     {
         Read( aLine );
-        aLine = aLine + OString('\n');
+        aLine += OString('\n');
     }
     ch = aLine[0];
     aLine = aLine.copy(1);
@@ -582,7 +582,7 @@ ErrCode SbiStream::Write( const OString& rBuf )
     }
     if( IsText() )
     {
-        aLine = aLine + rBuf;
+        aLine += rBuf;
         // Get it out, if the end is an LF, but strip CRLF before,
         // because the SvStream adds a CRLF!
         sal_Int32 nLineLen = aLine.getLength();
@@ -729,7 +729,7 @@ char SbiIoSystem::Read()
         if( aIn.isEmpty() )
         {
             ReadCon( aIn );
-            aIn = aIn + OString('\n');
+            aIn += OString('\n');
         }
         ch = aIn[0];
         aIn = aIn.copy(1);
diff --git a/chart2/source/view/main/VLegend.cxx b/chart2/source/view/main/VLegend.cxx
index cc7ff9a2d567..c8edeeed00a0 100644
--- a/chart2/source/view/main/VLegend.cxx
+++ b/chart2/source/view/main/VLegend.cxx
@@ -167,7 +167,7 @@ awt::Size lcl_createTextShapes(
                 if( i == 1 )
                     break;
 
-                aLabelString = aLabelString + aLabelSeq[i]->getString();
+                aLabelString += aLabelSeq[i]->getString();
                 // workaround for Issue #i67540#
                 if( aLabelString.isEmpty())
                     aLabelString = " ";
diff --git a/connectivity/source/drivers/ado/ADatabaseMetaData.cxx b/connectivity/source/drivers/ado/ADatabaseMetaData.cxx
index 29871b110f13..8e46761e8c27 100644
--- a/connectivity/source/drivers/ado/ADatabaseMetaData.cxx
+++ b/connectivity/source/drivers/ado/ADatabaseMetaData.cxx
@@ -916,7 +916,7 @@ OUString SAL_CALL ODatabaseMetaData::getSQLKeywords(  )
             WpOLEAppendCollection<ADOFields, ADOField, WpADOField>  aFields(aRecordset.GetFields());
             WpADOField aField(aFields.GetItem(0));
             aField.get_Value(aValue);
-            aRet = aRet + aValue.getString() + ",";
+            aRet += aValue.getString() + ",";
             aRecordset.MoveNext();
         }
         aRecordset.Close();
diff --git a/connectivity/source/drivers/firebird/DatabaseMetaData.cxx b/connectivity/source/drivers/firebird/DatabaseMetaData.cxx
index 74015586c093..b0344b5f8b8f 100644
--- a/connectivity/source/drivers/firebird/DatabaseMetaData.cxx
+++ b/connectivity/source/drivers/firebird/DatabaseMetaData.cxx
@@ -1502,9 +1502,9 @@ uno::Reference< XResultSet > ODatabaseMetaData::lcl_getKeys(const bool& bIsImpor
            "ON FOREI.RDB$INDEX_NAME = FOREIGN_INDEX.RDB$INDEX_NAME "
            "WHERE FOREI.RDB$CONSTRAINT_TYPE = 'FOREIGN KEY' ";
     if (bIsImport)
-        sSQL = sSQL + "AND FOREI.RDB$RELATION_NAME = '"+ table +"'";
+        sSQL += "AND FOREI.RDB$RELATION_NAME = '"+ table +"'";
     else
-        sSQL = sSQL + "AND PRIM.RDB$RELATION_NAME = '"+ table +"'";
+        sSQL += "AND PRIM.RDB$RELATION_NAME = '"+ table +"'";
 
     uno::Reference< XResultSet > rs = statement->executeQuery(sSQL);
     uno::Reference< XRow > xRow( rs, UNO_QUERY_THROW );
diff --git a/connectivity/source/drivers/odbc/OConnection.cxx b/connectivity/source/drivers/odbc/OConnection.cxx
index e879684b68fa..589697f7ff72 100644
--- a/connectivity/source/drivers/odbc/OConnection.cxx
+++ b/connectivity/source/drivers/odbc/OConnection.cxx
@@ -224,13 +224,13 @@ SQLRETURN OConnection::Construct(const OUString& url,const Sequence< PropertyVal
         {
             if( ! (pBegin->Value >>= aUID) )
                 SAL_WARN("connectivity.odbc", "Construct: unable to get property user");
-            aDSN = aDSN + ";UID=" + aUID;
+            aDSN += ";UID=" + aUID;
         }
         else if( pBegin->Name == "password")
         {
             if( ! (pBegin->Value >>= aPWD) )
                 SAL_WARN("connectivity.odbc", "Construct: unable to get property password");
-            aDSN = aDSN + ";PWD=" + aPWD;
+            aDSN += ";PWD=" + aPWD;
         }
         else if( pBegin->Name == "UseCatalog")
         {
diff --git a/dbaccess/source/ui/dlg/DbAdminImpl.cxx b/dbaccess/source/ui/dlg/DbAdminImpl.cxx
index 30037f1bbdf4..04a4da3a4aa3 100644
--- a/dbaccess/source/ui/dlg/DbAdminImpl.cxx
+++ b/dbaccess/source/ui/dlg/DbAdminImpl.cxx
@@ -124,7 +124,7 @@ namespace
 
         if ( _pPortNumber )
         {
-            sNewUrl = sNewUrl + ":" + OUString::number(_pPortNumber->GetValue());
+            sNewUrl += ":" + OUString::number(_pPortNumber->GetValue());
         }
 
         return sNewUrl;
diff --git a/dbaccess/source/ui/misc/TokenWriter.cxx b/dbaccess/source/ui/misc/TokenWriter.cxx
index d134f3207d09..29a606b765c8 100644
--- a/dbaccess/source/ui/misc/TokenWriter.cxx
+++ b/dbaccess/source/ui/misc/TokenWriter.cxx
@@ -690,11 +690,11 @@ void OHTMLImportExport::WriteBody()
 
 void OHTMLImportExport::WriteTables()
 {
-    OString aStrOut  = OOO_STRING_SVTOOLS_HTML_table;
-    aStrOut = aStrOut + " ";
-    aStrOut = aStrOut + OOO_STRING_SVTOOLS_HTML_frame;
-    aStrOut = aStrOut + "=";
-    aStrOut = aStrOut + OOO_STRING_SVTOOLS_HTML_TF_void;
+    OString aStrOut  = OOO_STRING_SVTOOLS_HTML_table
+            " "
+            OOO_STRING_SVTOOLS_HTML_frame
+            "="
+            OOO_STRING_SVTOOLS_HTML_TF_void;
 
     Sequence< OUString> aNames;
     Reference<XNameAccess> xColumns;
@@ -714,21 +714,21 @@ void OHTMLImportExport::WriteTables()
         }
     }
 
-    aStrOut = aStrOut + " ";
-    aStrOut = aStrOut + OOO_STRING_SVTOOLS_HTML_O_align;
-    aStrOut = aStrOut + "=";
-    aStrOut = aStrOut + OOO_STRING_SVTOOLS_HTML_AL_left;
-    aStrOut = aStrOut + " ";
-    aStrOut = aStrOut + OOO_STRING_SVTOOLS_HTML_O_cellspacing;
-    aStrOut = aStrOut + "=";
-    aStrOut = aStrOut + OString::number(nCellSpacing);
-    aStrOut = aStrOut + " ";
-    aStrOut = aStrOut + OOO_STRING_SVTOOLS_HTML_O_cols;
-    aStrOut = aStrOut + "=";
-    aStrOut = aStrOut + OString::number(aNames.getLength());
-    aStrOut = aStrOut + " ";
-    aStrOut = aStrOut + OOO_STRING_SVTOOLS_HTML_O_border;
-    aStrOut = aStrOut + "=1";
+    aStrOut += " "
+            OOO_STRING_SVTOOLS_HTML_O_align
+            "="
+            OOO_STRING_SVTOOLS_HTML_AL_left
+            " "
+            OOO_STRING_SVTOOLS_HTML_O_cellspacing
+            "=" +
+            OString::number(nCellSpacing) +
+            " "
+            OOO_STRING_SVTOOLS_HTML_O_cols
+            "=" +
+            OString::number(aNames.getLength()) +
+            " "
+            OOO_STRING_SVTOOLS_HTML_O_border
+            "=1";
 
     IncIndent(1);
     TAG_ON( aStrOut.getStr() );
@@ -861,20 +861,19 @@ void OHTMLImportExport::WriteCell( sal_Int32 nFormat, sal_Int32 nWidthPixel, sal
     // despite the <TABLE COLS=n> and <COL WIDTH=x> designation necessary,
     // as Netscape is not paying attention to them.
     // column width
-    aStrTD = aStrTD + " ";
-    aStrTD = aStrTD + OOO_STRING_SVTOOLS_HTML_O_width;
-    aStrTD = aStrTD + "=";
-    aStrTD = aStrTD + OString::number(nWidthPixel);
+    aStrTD += " "
+            OOO_STRING_SVTOOLS_HTML_O_width
+            "=" +
+            OString::number(nWidthPixel) +
     // line height
-    aStrTD = aStrTD + " ";
-    aStrTD = aStrTD + OOO_STRING_SVTOOLS_HTML_O_height;
-    aStrTD = aStrTD + "=";
-    aStrTD = aStrTD + OString::number(nHeightPixel);
-
-    aStrTD = aStrTD + " ";
-    aStrTD = aStrTD + OOO_STRING_SVTOOLS_HTML_O_align;
-    aStrTD = aStrTD + "=";
-    aStrTD = aStrTD + pChar;
+            " "
+            OOO_STRING_SVTOOLS_HTML_O_height
+            "=" +
+            OString::number(nHeightPixel) +
+            " "
+            OOO_STRING_SVTOOLS_HTML_O_align
+            "=" +
+            pChar;
 
     SvNumberFormatsSupplierObj* pSupplierImpl = m_xFormatter.is() ? comphelper::getUnoTunnelImplementation<SvNumberFormatsSupplierObj>(m_xFormatter->getNumberFormatsSupplier()) : nullptr;
     SvNumberFormatter* pFormatter = pSupplierImpl ? pSupplierImpl->GetNumberFormatter() : nullptr;
@@ -929,18 +928,18 @@ void OHTMLImportExport::FontOn()
 #endif
 
     // <FONT FACE="xxx">
-    OString aStrOut  = "<";
-    aStrOut  = aStrOut + OOO_STRING_SVTOOLS_HTML_font;
-    aStrOut  = aStrOut + " ";
-    aStrOut  = aStrOut + OOO_STRING_SVTOOLS_HTML_O_face;
-    aStrOut  = aStrOut + "=";
-    aStrOut  = aStrOut + "\"";
-    aStrOut  = aStrOut + OUStringToOString(m_aFont.Name,osl_getThreadTextEncoding());
+    OString aStrOut  = "<"
+            OOO_STRING_SVTOOLS_HTML_font
+            " "
+            OOO_STRING_SVTOOLS_HTML_O_face
+            "="
+            "\"" +
+            OUStringToOString(m_aFont.Name,osl_getThreadTextEncoding()) +
         // TODO : think about the encoding of the font name
-    aStrOut  = aStrOut + "\"";
-    aStrOut  = aStrOut + " ";
-    aStrOut  = aStrOut + OOO_STRING_SVTOOLS_HTML_O_color;
-    aStrOut  = aStrOut + "=";
+            "\""
+            " "
+            OOO_STRING_SVTOOLS_HTML_O_color
+            "=";
     m_pStream->WriteOString( aStrOut );
 
     sal_Int32 nColor = 0;
diff --git a/editeng/source/items/frmitems.cxx b/editeng/source/items/frmitems.cxx
index 4cb09608cf2e..1d74227313fe 100644
--- a/editeng/source/items/frmitems.cxx
+++ b/editeng/source/items/frmitems.cxx
@@ -556,8 +556,7 @@ bool SvxLRSpaceItem::GetPresentation
                     Application::GetSettings().GetUILanguageTag());
             else
             {
-                rText = rText +
-                        GetMetricText( nLeftMargin, eCoreUnit, ePresUnit, &rIntl ) +
+                rText += GetMetricText( nLeftMargin, eCoreUnit, ePresUnit, &rIntl ) +
                         " " + EditResId(GetMetricId(ePresUnit));
             }
             rText += OUString(cpDelim);
@@ -565,12 +564,11 @@ bool SvxLRSpaceItem::GetPresentation
             {
                 rText += EditResId(RID_SVXITEMS_LRSPACE_FLINE);
                 if ( 100 != nPropFirstLineOfst )
-                    rText = rText + unicode::formatPercent(nPropFirstLineOfst,
-                    Application::GetSettings().GetUILanguageTag());
+                    rText += unicode::formatPercent(nPropFirstLineOfst,
+                                Application::GetSettings().GetUILanguageTag());
                 else
                 {
-                    rText = rText +
-                            GetMetricText( static_cast<long>(nFirstLineOfst),
+                    rText += GetMetricText( static_cast<long>(nFirstLineOfst),
                                             eCoreUnit, ePresUnit, &rIntl ) +
                             " " + EditResId(GetMetricId(ePresUnit));
                 }
@@ -578,12 +576,11 @@ bool SvxLRSpaceItem::GetPresentation
             }
             rText += EditResId(RID_SVXITEMS_LRSPACE_RIGHT);
             if ( 100 != nPropRightMargin )
-                rText = rText + unicode::formatPercent(nPropRightMargin,
+                rText += unicode::formatPercent(nPropRightMargin,
                     Application::GetSettings().GetUILanguageTag());
             else
             {
-                rText = rText +
-                        GetMetricText( nRightMargin,
+                rText += GetMetricText( nRightMargin,
                                        eCoreUnit, ePresUnit, &rIntl ) +
                         " " + EditResId(GetMetricId(ePresUnit));
             }
@@ -799,11 +796,10 @@ bool SvxULSpaceItem::GetPresentation
             }
             else
             {
-                rText = rText +
-                        GetMetricText( static_cast<long>(nUpper), eCoreUnit, ePresUnit, &rIntl ) +
+                rText += GetMetricText( static_cast<long>(nUpper), eCoreUnit, ePresUnit, &rIntl ) +
                         " " + EditResId(GetMetricId(ePresUnit));
             }
-            rText = rText + OUString(cpDelim) + EditResId(RID_SVXITEMS_ULSPACE_LOWER);
+            rText += OUString(cpDelim) + EditResId(RID_SVXITEMS_ULSPACE_LOWER);
             if ( 100 != nPropLower )
             {
                 rText += unicode::formatPercent(nPropLower,
@@ -811,8 +807,7 @@ bool SvxULSpaceItem::GetPresentation
             }
             else
             {
-                rText = rText +
-                        GetMetricText( static_cast<long>(nLower), eCoreUnit, ePresUnit, &rIntl ) +
+                rText += GetMetricText( static_cast<long>(nLower), eCoreUnit, ePresUnit, &rIntl ) +
                         " " + EditResId(GetMetricId(ePresUnit));
             }
             return true;
@@ -965,7 +960,7 @@ bool SvxProtectItem::GetPresentation
 
     if ( bSize )
         pId = RID_SVXITEMS_PROT_SIZE_TRUE;
-    rText = rText + EditResId(pId) + OUString(cpDelim);
+    rText += EditResId(pId) + OUString(cpDelim);
     pId = RID_SVXITEMS_PROT_POS_FALSE;
 
     if ( bPos )
@@ -1176,8 +1171,7 @@ bool SvxShadowItem::GetPresentation
 
             if ( aShadowColor.GetTransparency() )
                 pId = RID_SVXITEMS_TRANSPARENT_TRUE;
-            rText = rText +
-                    EditResId(pId) +
+            rText += EditResId(pId) +
                     OUString(cpDelim) +
                     GetMetricText( static_cast<long>(nWidth), eCoreUnit, ePresUnit, &rIntl ) +
                     OUString(cpDelim) +
@@ -1193,8 +1187,7 @@ bool SvxShadowItem::GetPresentation
             const char* pId = RID_SVXITEMS_TRANSPARENT_FALSE;
             if ( aShadowColor.GetTransparency() )
                 pId = RID_SVXITEMS_TRANSPARENT_TRUE;
-            rText = rText +
-                    EditResId(pId) +
+            rText += EditResId(pId) +
                     OUString(cpDelim) +
                     GetMetricText( static_cast<long>(nWidth), eCoreUnit, ePresUnit, &rIntl ) +
                     " " + EditResId(GetMetricId(ePresUnit)) +
@@ -1722,23 +1715,22 @@ bool SvxBoxItem::GetPresentation
             {
                 if ( pBottom )
                 {
-                    rText = rText + pBottom->GetValueString( eCoreUnit, ePresUnit, &rIntl ) + cpDelimTmp;
+                    rText += pBottom->GetValueString( eCoreUnit, ePresUnit, &rIntl ) + cpDelimTmp;
                 }
                 if ( pLeft )
                 {
-                    rText = rText + pLeft->GetValueString( eCoreUnit, ePresUnit, &rIntl ) + cpDelimTmp;
+                    rText += pLeft->GetValueString( eCoreUnit, ePresUnit, &rIntl ) + cpDelimTmp;
                 }
                 if ( pRight )
                 {
-                    rText = rText + pRight->GetValueString( eCoreUnit, ePresUnit, &rIntl ) + cpDelimTmp;
+                    rText += pRight->GetValueString( eCoreUnit, ePresUnit, &rIntl ) + cpDelimTmp;
                 }
             }
             rText += GetMetricText( static_cast<long>(nTopDist), eCoreUnit, ePresUnit, &rIntl );
             if( nTopDist != nBottomDist || nTopDist != nLeftDist ||
                 nTopDist != nRightDist )
             {
-                rText = rText +
-                        cpDelimTmp +
+                rText += cpDelimTmp +
                         GetMetricText( static_cast<long>(nBottomDist), eCoreUnit,
                                         ePresUnit, &rIntl ) +
                         cpDelimTmp +
@@ -1767,29 +1759,25 @@ bool SvxBoxItem::GetPresentation
                 {
                     if ( pTop )
                     {
-                        rText = rText +
-                                EditResId(RID_SVXITEMS_BORDER_TOP) +
+                        rText += EditResId(RID_SVXITEMS_BORDER_TOP) +
                                 pTop->GetValueString( eCoreUnit, ePresUnit, &rIntl, true ) +
                                 cpDelimTmp;
                     }
                     if ( pBottom )
                     {
-                        rText = rText +
-                                EditResId(RID_SVXITEMS_BORDER_BOTTOM) +
+                        rText += EditResId(RID_SVXITEMS_BORDER_BOTTOM) +
                                 pBottom->GetValueString( eCoreUnit, ePresUnit, &rIntl, true ) +
                                 cpDelimTmp;
                     }
                     if ( pLeft )
                     {
-                        rText = rText +
-                                EditResId(RID_SVXITEMS_BORDER_LEFT) +
+                        rText += EditResId(RID_SVXITEMS_BORDER_LEFT) +
                                 pLeft->GetValueString( eCoreUnit, ePresUnit, &rIntl, true ) +
                                 cpDelimTmp;
                     }
                     if ( pRight )
                     {
-                        rText = rText +
-                                EditResId(RID_SVXITEMS_BORDER_RIGHT) +
+                        rText += EditResId(RID_SVXITEMS_BORDER_RIGHT) +
                                 pRight->GetValueString( eCoreUnit, ePresUnit, &rIntl, true ) +
                                 cpDelimTmp;
                     }
@@ -1800,15 +1788,13 @@ bool SvxBoxItem::GetPresentation
             if( nTopDist == nBottomDist && nTopDist == nLeftDist &&
                 nTopDist == nRightDist )
             {
-                rText = rText +
-                        GetMetricText( static_cast<long>(nTopDist), eCoreUnit,
+                rText += GetMetricText( static_cast<long>(nTopDist), eCoreUnit,
                                             ePresUnit, &rIntl ) +
                         " " + EditResId(GetMetricId(ePresUnit));
             }
             else
             {
-                rText = rText +
-                        EditResId(RID_SVXITEMS_BORDER_TOP) +
+                rText += EditResId(RID_SVXITEMS_BORDER_TOP) +
                         GetMetricText( static_cast<long>(nTopDist), eCoreUnit,
                                         ePresUnit, &rIntl ) +
                         " " + EditResId(GetMetricId(ePresUnit)) +
diff --git a/editeng/source/items/optitems.cxx b/editeng/source/items/optitems.cxx
index 1186192c088b..aeeb15314e01 100644
--- a/editeng/source/items/optitems.cxx
+++ b/editeng/source/items/optitems.cxx
@@ -56,8 +56,7 @@ bool SfxHyphenRegionItem::GetPresentation
     const IntlWrapper&
 )   const
 {
-    rText = rText +
-            EditResId(RID_SVXITEMS_HYPHEN_MINLEAD).replaceAll("%1", OUString::number(nMinLead)) +
+    rText += EditResId(RID_SVXITEMS_HYPHEN_MINLEAD).replaceAll("%1", OUString::number(nMinLead)) +
             "," +
             EditResId(RID_SVXITEMS_HYPHEN_MINTRAIL).replaceAll("%1", OUString::number(nMinTrail));
     return true;
diff --git a/editeng/source/items/paraitem.cxx b/editeng/source/items/paraitem.cxx
index ed159e14ed08..983f210dec3a 100644
--- a/editeng/source/items/paraitem.cxx
+++ b/editeng/source/items/paraitem.cxx
@@ -660,7 +660,7 @@ bool SvxHyphenZoneItem::GetPresentation
 
             if ( bPageEnd )
                 pId = RID_SVXITEMS_PAGE_END_TRUE;
-            rText = rText + EditResId(pId) + cpDelimTmp +
+            rText += EditResId(pId) + cpDelimTmp +
                     OUString::number( nMinLead ) + cpDelimTmp +
                     OUString::number( nMinTrail ) + cpDelimTmp +
                     OUString::number( nMaxHyphens );
@@ -677,8 +677,7 @@ bool SvxHyphenZoneItem::GetPresentation
 
             if ( bPageEnd )
                 pId = RID_SVXITEMS_PAGE_END_TRUE;
-            rText = rText +
-                    EditResId(pId) +
+            rText += EditResId(pId) +
                     cpDelimTmp +
                     EditResId(RID_SVXITEMS_HYPHEN_MINLEAD).replaceAll("%1", OUString::number(nMinLead)) +
                     cpDelimTmp +
diff --git a/editeng/source/items/textitem.cxx b/editeng/source/items/textitem.cxx
index ffb4e63e2e21..82889dc91be7 100644
--- a/editeng/source/items/textitem.cxx
+++ b/editeng/source/items/textitem.cxx
@@ -965,7 +965,7 @@ bool SvxTextLineItem::GetPresentation
 {
     rText = GetValueTextByPos( GetValue() );
     if( !mColor.GetTransparency() )
-        rText = rText + OUString(cpDelim) + ::GetColorString( mColor );
+        rText += OUString(cpDelim) + ::GetColorString( mColor );
     return true;
 }
 
@@ -1540,8 +1540,7 @@ bool SvxKerningItem::GetPresentation
 
             if (pId)
                 rText += EditResId(pId);
-            rText = rText +
-                    GetMetricText( static_cast<long>(GetValue()), eCoreUnit, MapUnit::MapPoint, &rIntl ) +
+            rText += GetMetricText( static_cast<long>(GetValue()), eCoreUnit, MapUnit::MapPoint, &rIntl ) +
                     " " + EditResId(GetMetricId(MapUnit::MapPoint));
             return true;
         }
@@ -1721,7 +1720,7 @@ bool SvxEscapementItem::GetPresentation
         if( DFLT_ESC_AUTO_SUPER == nEsc || DFLT_ESC_AUTO_SUB == nEsc )
             rText += EditResId(RID_SVXITEMS_ESCAPEMENT_AUTO);
         else
-            rText = rText + OUString::number( nEsc ) + "%";
+            rText += OUString::number( nEsc ) + "%";
     }
     return true;
 }
diff --git a/editeng/source/rtf/svxrtf.cxx b/editeng/source/rtf/svxrtf.cxx
index f78fcb891454..7f5fdd34ac6a 100644
--- a/editeng/source/rtf/svxrtf.cxx
+++ b/editeng/source/rtf/svxrtf.cxx
@@ -559,7 +559,7 @@ void SvxRTFParser::ReadFontTable()
         {
             // All data from the font is available, so off to the table
             if (!sAltNm.isEmpty())
-                sFntNm = sFntNm + ";" + sAltNm;
+                sFntNm += ";" + sAltNm;
 
             pFont->SetFamilyName( sFntNm );
             m_FontTable.insert(std::make_pair(nInsFontNo, std::move(pFont)));
diff --git a/helpcompiler/inc/HelpCompiler.hxx b/helpcompiler/inc/HelpCompiler.hxx
index 2b4a6bad049d..49a22205cae7 100644
--- a/helpcompiler/inc/HelpCompiler.hxx
+++ b/helpcompiler/inc/HelpCompiler.hxx
@@ -108,7 +108,7 @@ namespace fs
         {
             OString tmp(in);
             OUString ustrSystemPath(OStringToOUString(tmp, getThreadTextEncoding()));
-            data = data + ustrSystemPath;
+            data += ustrSystemPath;
         }
         void append(const std::string &in) { append(in.c_str()); }
     };
diff --git a/include/vcl/weld.hxx b/include/vcl/weld.hxx
index be9cf23f0779..33dadea0cc03 100644
--- a/include/vcl/weld.hxx
+++ b/include/vcl/weld.hxx
@@ -1857,7 +1857,7 @@ public:
         sal_Int32 nIdx = m_sHelpRoot.lastIndexOf('.');
         if (nIdx != -1)
             m_sHelpRoot = m_sHelpRoot.copy(0, nIdx);
-        m_sHelpRoot = m_sHelpRoot + OString('/');
+        m_sHelpRoot += OString('/');
     }
     virtual std::unique_ptr<MessageDialog> weld_message_dialog(const OString& id,
                                                                bool bTakeOwnership = true)
diff --git a/lotuswordpro/source/filter/xfilter/xfstylecont.cxx b/lotuswordpro/source/filter/xfilter/xfstylecont.cxx
index 8e2a675a3281..2d8f9139aaaa 100644
--- a/lotuswordpro/source/filter/xfilter/xfstylecont.cxx
+++ b/lotuswordpro/source/filter/xfilter/xfstylecont.cxx
@@ -113,7 +113,7 @@ IXFStyleRet XFStyleContainer::AddStyle(std::unique_ptr<IXFStyle> pStyle)
             //for name conflict
             if(FindStyle( name))
             {
-                name = name + OUString::number(m_aStyles.size()+1);
+                name += OUString::number(m_aStyles.size()+1);
                 pStyle->SetStyleName(name);
             }
         }
diff --git a/odk/examples/DevelopersGuide/Database/DriverSkeleton/SConnection.cxx b/odk/examples/DevelopersGuide/Database/DriverSkeleton/SConnection.cxx
index 1734031e11d9..775fe6cef1db 100644
--- a/odk/examples/DevelopersGuide/Database/DriverSkeleton/SConnection.cxx
+++ b/odk/examples/DevelopersGuide/Database/DriverSkeleton/SConnection.cxx
@@ -109,12 +109,12 @@ void OConnection::construct(const ::rtl::OUString& url,const Sequence< PropertyV
         else if(pBegin->Name.equalsAscii(pUser))
         {
             pBegin->Value >>= aUID;
-            aDSN = aDSN + ";UID=" + aUID;
+            aDSN += ";UID=" + aUID;
         }
         else if(pBegin->Name.equalsAscii(pPwd))
         {
             pBegin->Value >>= aPWD;
-            aDSN = aDSN + ";PWD=" + aPWD;
+            aDSN += ";PWD=" + aPWD;
         }
         else if(pBegin->Name.equalsAscii(pUseCatalog))
         {
diff --git a/reportdesign/source/filter/xml/xmlExport.cxx b/reportdesign/source/filter/xml/xmlExport.cxx
index b548f991dcc6..2f00950b265c 100644
--- a/reportdesign/source/filter/xml/xmlExport.cxx
+++ b/reportdesign/source/filter/xml/xmlExport.cxx
@@ -1535,7 +1535,7 @@ void ORptExport::exportGroupsExpressionAsFunction(const Reference< XGroups>& _xG
                             // so we need to expand the formula of sCountName
                             sPrefix = " + 1) / " + OUString::number(xGroup->getGroupInterval());
                             sFunctionName = sFunction + "_" + sExpression;
-                            sFunction = sFunction + "(";
+                            sFunction += "(";
                             sInitialFormula = "rpt:0";
                         }
                         break;
diff --git a/sax/qa/cppunit/xmlimport.cxx b/sax/qa/cppunit/xmlimport.cxx
index 0762c249bdd4..63415c8b0b39 100644
--- a/sax/qa/cppunit/xmlimport.cxx
+++ b/sax/qa/cppunit/xmlimport.cxx
@@ -156,15 +156,15 @@ void SAL_CALL TestDocumentHandler::startElement( const OUString& aName, const Re
         OUString sAttrValue = xAttribs->getValueByIndex(i);
         OUString sAttrName = canonicalform(xAttribs->getNameByIndex(i), sAttrValue, false);
         if (!sAttrName.isEmpty())
-            sAttributes = sAttributes + sAttrName + sAttrValue;
+            sAttributes += sAttrName + sAttrValue;
     }
-    m_aStr = m_aStr + canonicalform(aName, "", true) + sAttributes;
+    m_aStr += canonicalform(aName, "", true) + sAttributes;
 }
 
 
 void SAL_CALL TestDocumentHandler::endElement( const OUString& aName )
 {
-    m_aStr = m_aStr + canonicalform(aName, "", true);
+    m_aStr += canonicalform(aName, "", true);
     sal_uInt16 nPopQty = m_aCountStack.top();
     for (sal_uInt16 i=0; i<nPopQty; i++)
         m_aNamespaceStack.pop_back();
@@ -174,19 +174,19 @@ void SAL_CALL TestDocumentHandler::endElement( const OUString& aName )
 
 void SAL_CALL TestDocumentHandler::characters( const OUString& aChars )
 {
-    m_aStr = m_aStr + aChars;
+    m_aStr += aChars;
 }
 
 
 void SAL_CALL TestDocumentHandler::ignorableWhitespace( const OUString& aWhitespaces )
 {
-    m_aStr = m_aStr + aWhitespaces;
+    m_aStr += aWhitespaces;
 }
 
 
 void SAL_CALL TestDocumentHandler::processingInstruction( const OUString& aTarget, const OUString& aData )
 {
-    m_aStr = m_aStr + aTarget + aData;
+    m_aStr += aTarget + aData;
 }
 
 
diff --git a/sc/source/core/data/attrib.cxx b/sc/source/core/data/attrib.cxx
index 5f1517250998..94a8922e334e 100644
--- a/sc/source/core/data/attrib.cxx
+++ b/sc/source/core/data/attrib.cxx
@@ -610,7 +610,7 @@ bool ScPageScaleToItem::GetPresentation(
     OUString aName( ScResId( STR_SCATTR_PAGE_SCALETO ) );
     OUString aValue( ScResId( STR_SCATTR_PAGE_SCALE_WIDTH ) );
     lclAppendScalePageCount( aValue, mnWidth );
-    aValue = aValue + ", " + ScResId( STR_SCATTR_PAGE_SCALE_HEIGHT );
+    aValue += ", " + ScResId( STR_SCATTR_PAGE_SCALE_HEIGHT );
     lclAppendScalePageCount( aValue, mnHeight );
 
     switch( ePres )
diff --git a/sc/source/core/data/docpool.cxx b/sc/source/core/data/docpool.cxx
index 95597eb2a61b..ce98a6ea45a5 100644
--- a/sc/source/core/data/docpool.cxx
+++ b/sc/source/core/data/docpool.cxx
@@ -429,7 +429,7 @@ static bool lcl_HFPresentation
                 aText = EditResId(RID_SVXITEMS_LRSPACE_LEFT);
                 if ( 100 != nPropLeftMargin )
                 {
-                    aText = aText + unicode::formatPercent(nPropLeftMargin,
+                    aText += unicode::formatPercent(nPropLeftMargin,
                         Application::GetSettings().GetUILanguageTag());
                 }
                 else
@@ -443,7 +443,7 @@ static bool lcl_HFPresentation
                     EditResId(RID_SVXITEMS_LRSPACE_RIGHT);
                 if ( 100 != nPropRightMargin )
                 {
-                    aText = aText + unicode::formatPercent(nPropLeftMargin,
+                    aText += unicode::formatPercent(nPropLeftMargin,
                         Application::GetSettings().GetUILanguageTag());
                 }
                 else
@@ -462,7 +462,7 @@ static bool lcl_HFPresentation
 
         if ( aText.getLength() )
         {
-            rText = rText + aText + " + ";
+            rText += aText + " + ";
         }
     }
 
@@ -559,7 +559,7 @@ bool ScDocumentPool::GetPresentation(
             if( nPercent )
             {
                 rText = ScResId(STR_SCATTR_PAGE_SCALE) + aStrSep;
-                rText = rText + unicode::formatPercent(nPercent,
+                rText += unicode::formatPercent(nPercent,
                     Application::GetSettings().GetUILanguageTag());
             }
             else
diff --git a/sc/source/core/opencl/formulagroupcl.cxx b/sc/source/core/opencl/formulagroupcl.cxx
index 8948160c4695..05deff486faa 100644
--- a/sc/source/core/opencl/formulagroupcl.cxx
+++ b/sc/source/core/opencl/formulagroupcl.cxx
@@ -2583,7 +2583,7 @@ public:
     {
         std::string t = "_" + mpCodeGen->BinFuncName();
         for (const auto & rSubArgument : mvSubArguments)
-            t = t + rSubArgument->DumpOpName();
+            t += rSubArgument->DumpOpName();
         return t;
     }
     virtual void DumpInlineFun( std::set<std::string>& decls,
diff --git a/sc/source/filter/excel/xecontent.cxx b/sc/source/filter/excel/xecontent.cxx
index c61425647e59..fc354d0ba69b 100644
--- a/sc/source/filter/excel/xecontent.cxx
+++ b/sc/source/filter/excel/xecontent.cxx
@@ -1255,7 +1255,7 @@ OString createHexStringFromDigit(sal_uInt8 nDigit)
 {
     OString aString = OString::number( nDigit, 16 );
     if(aString.getLength() == 1)
-        aString = aString + OString::number(0);
+        aString += OString::number(0);
     return aString;
 }
 
diff --git a/sc/source/ui/app/inputhdl.cxx b/sc/source/ui/app/inputhdl.cxx
index e7090c108bbd..111c57d9f105 100644
--- a/sc/source/ui/app/inputhdl.cxx
+++ b/sc/source/ui/app/inputhdl.cxx
@@ -1592,7 +1592,7 @@ static OUString lcl_Calculate( const OUString& rFormula, ScDocument* pDoc, const
 
     ScRange aTestRange;
     if ( bColRowName || (aTestRange.Parse(rFormula) & ScRefFlags::VALID) )
-        aValue = aValue + " ...";
+        aValue += " ...";
 
     return aValue;
 }
diff --git a/sc/source/ui/view/gridwin.cxx b/sc/source/ui/view/gridwin.cxx
index 06f74bab50bd..18c83970a895 100644
--- a/sc/source/ui/view/gridwin.cxx
+++ b/sc/source/ui/view/gridwin.cxx
@@ -2282,7 +2282,7 @@ void ScGridWindow::MouseButtonUp( const MouseEvent& rMEvt )
                 if ( aScRange.aStart == aScRange.aEnd )
                 {
                     //  make sure there is a range selection string even for a single cell
-                    aAddr = aAddr + ":" + aAddr;
+                    aAddr += ":" + aAddr;
                 }
 
                 //! SID_MARKAREA does not exist anymore ???
diff --git a/sd/source/ui/accessibility/AccessibleDocumentViewBase.cxx b/sd/source/ui/accessibility/AccessibleDocumentViewBase.cxx
index c3004e7c1d61..d0fc351dee60 100644
--- a/sd/source/ui/accessibility/AccessibleDocumentViewBase.cxx
+++ b/sd/source/ui/accessibility/AccessibleDocumentViewBase.cxx
@@ -691,7 +691,7 @@ uno::Any SAL_CALL AccessibleDocumentViewBase::getExtendedAttributes()
                     if (!layerAltText.isEmpty())
                     {
                         sName = " ";
-                        sDisplay = sDisplay + sName + layerAltText;
+                        sDisplay += sName + layerAltText;
                     }
                 }
             }
diff --git a/sd/source/ui/annotations/annotationmanager.cxx b/sd/source/ui/annotations/annotationmanager.cxx
index aa56364c8889..512415465307 100644
--- a/sd/source/ui/annotations/annotationmanager.cxx
+++ b/sd/source/ui/annotations/annotationmanager.cxx
@@ -155,7 +155,7 @@ OUString getAnnotationDateTimeString( const Reference< XAnnotation >& xAnnotatio
 
         ::tools::Time aTime( aDateTime );
         if(aTime.GetTime() != 0)
-            sRet = sRet + " "  + rLocalData.getTime( aTime,false );
+            sRet += " "  + rLocalData.getTime( aTime,false );
     }
     return sRet;
 }
diff --git a/sd/source/ui/dlg/custsdlg.cxx b/sd/source/ui/dlg/custsdlg.cxx
index b18a6e05e5d2..dfb07394b904 100644
--- a/sd/source/ui/dlg/custsdlg.cxx
+++ b/sd/source/ui/dlg/custsdlg.cxx
@@ -182,14 +182,14 @@ void SdCustomShowDlg::SelectHdl(void const *p)
             sal_Int32 nNum = 1;
             if( nStrPos < 0 )
             {
-                aStr = aStr + " ("  + aStrCopy + OUString::number( nNum ) + ")";
+                aStr += " ("  + aStrCopy + OUString::number( nNum ) + ")";
                 nStrPos = aStr.indexOf( aStrCopy );
             }
             nStrPos = nStrPos + aStrCopy.getLength();
             // that we do not access into the nirvana (--> endless loop)
             if( nStrPos >= aStr.getLength() )
             {
-                aStr = aStr + " " + OUString::number( nNum );
+                aStr += " " + OUString::number( nNum );
             }
 
             // check name...
diff --git a/setup_native/source/win32/customactions/shellextensions/completeinstallpath.cxx b/setup_native/source/win32/customactions/shellextensions/completeinstallpath.cxx
index ee8c71369720..787041ed8f7e 100644
--- a/setup_native/source/win32/customactions/shellextensions/completeinstallpath.cxx
+++ b/setup_native/source/win32/customactions/shellextensions/completeinstallpath.cxx
@@ -104,7 +104,7 @@ extern "C" __declspec(dllexport) UINT __stdcall CompleteInstallPath( MSIHANDLE h
         if ( oldVersionExists )
         {
             // Adding the new path content sOfficeDirHostname
-            sInstallLocation = sInstallLocation + sOfficeDirHostname;
+            sInstallLocation += sOfficeDirHostname;
             // Setting the new property value
             MsiSetPropertyW(handle, L"INSTALLLOCATION", sInstallLocation.c_str());
         }
diff --git a/sfx2/source/dialog/mailmodel.cxx b/sfx2/source/dialog/mailmodel.cxx
index 901c435f6d94..4957f7168c50 100644
--- a/sfx2/source/dialog/mailmodel.cxx
+++ b/sfx2/source/dialog/mailmodel.cxx
@@ -849,7 +849,7 @@ bool CreateFromAddress_Impl( OUString& rFrom )
     {
         if ( !rFrom.isEmpty() )
             rFrom += " ";
-        rFrom = rFrom + "<" + comphelper::string::strip(aEmailName, ' ') + ">";
+        rFrom += "<" + comphelper::string::strip(aEmailName, ' ') + ">";
     }
     else
         rFrom.clear();
diff --git a/sfx2/source/dialog/versdlg.cxx b/sfx2/source/dialog/versdlg.cxx
index 2aece774b2cd..1901ce9b2c29 100644
--- a/sfx2/source/dialog/versdlg.cxx
+++ b/sfx2/source/dialog/versdlg.cxx
@@ -181,8 +181,8 @@ SfxVersionDialog::SfxVersionDialog(weld::Window* pParent, SfxViewFrame* pVwFrame
     m_xVersionBox->grab_focus();
 
     // set dialog title (filename or docinfo title)
-    OUString sText = m_xDialog->get_title();
-    sText = sText + " " + m_pViewFrame->GetObjectShell()->GetTitle();
+    OUString sText = m_xDialog->get_title() +
+                    " " + m_pViewFrame->GetObjectShell()->GetTitle();
     m_xDialog->set_title(sText);
 
     Init_Impl();
@@ -441,8 +441,8 @@ SfxCmisVersionsDialog::SfxCmisVersionsDialog(weld::Window* pParent, SfxViewFrame
 
     m_xVersionBox->grab_focus();
 
-    OUString sText = m_xDialog->get_title();
-    sText = sText + " " + m_pViewFrame->GetObjectShell()->GetTitle();
+    OUString sText = m_xDialog->get_title() +
+                    " " + m_pViewFrame->GetObjectShell()->GetTitle();
     m_xDialog->set_title(sText);
 
     LoadVersions();
diff --git a/sfx2/source/doc/DocumentMetadataAccess.cxx b/sfx2/source/doc/DocumentMetadataAccess.cxx
index 1e5dca13b1e7..5574bcada016 100644
--- a/sfx2/source/doc/DocumentMetadataAccess.cxx
+++ b/sfx2/source/doc/DocumentMetadataAccess.cxx
@@ -150,7 +150,7 @@ uno::Reference<rdf::XURI> createBaseURI(
         assert(!pkgURI.isEmpty());
         if (!pkgURI.isEmpty() && !pkgURI.endsWith("/"))
         {
-            pkgURI = pkgURI + "/";
+            pkgURI += "/";
         }
     }
 
diff --git a/sfx2/source/doc/sfxbasemodel.cxx b/sfx2/source/doc/sfxbasemodel.cxx
index 46d6be1a7840..cc2aae255542 100644
--- a/sfx2/source/doc/sfxbasemodel.cxx
+++ b/sfx2/source/doc/sfxbasemodel.cxx
@@ -295,7 +295,7 @@ struct IMPL_SfxBaseModel_DataContainer : public ::sfx2::IModifiableDocument
             OSL_ENSURE(!uri.isEmpty(), "GetDMA: empty uri?");
             if (!uri.isEmpty() && !uri.endsWith("/"))
             {
-                uri = uri + "/";
+                uri += "/";
             }
 
             m_xDocumentMetadata = new ::sfx2::DocumentMetadataAccess(
diff --git a/sfx2/source/doc/templatedlg.cxx b/sfx2/source/doc/templatedlg.cxx
index db83da0140bd..90c8c4dda017 100644
--- a/sfx2/source/doc/templatedlg.cxx
+++ b/sfx2/source/doc/templatedlg.cxx
@@ -914,7 +914,7 @@ void SfxTemplateManagerDlg::OnTemplateImportCategory(const OUString& sCategory)
             if (aTemplateList.isEmpty())
                 aTemplateList = rFile;
             else
-                aTemplateList = aTemplateList + "\n" + rFile;
+                aTemplateList += "\n" + rFile;
         }
     }
 
@@ -968,7 +968,7 @@ void SfxTemplateManagerDlg::OnTemplateExport()
                 if (aTemplateList.isEmpty())
                     aTemplateList = pItem->maTitle;
                 else
-                    aTemplateList = aTemplateList + "\n" + pItem->maTitle;
+                    aTemplateList += "\n" + pItem->maTitle;
             }
             ++i;
         }
@@ -1001,7 +1001,7 @@ void SfxTemplateManagerDlg::OnTemplateExport()
                 if (aTemplateList.isEmpty())
                     aTemplateList = pItem->maTitle;
                 else
-                    aTemplateList = aTemplateList + "\n" + pItem->maTitle;
+                    aTemplateList += "\n" + pItem->maTitle;
             }
             ++i;
         }
diff --git a/stoc/source/defaultregistry/defaultregistry.cxx b/stoc/source/defaultregistry/defaultregistry.cxx
index 71a637309c5a..f0a4d0ff18a3 100644
--- a/stoc/source/defaultregistry/defaultregistry.cxx
+++ b/stoc/source/defaultregistry/defaultregistry.cxx
@@ -827,7 +827,7 @@ sal_Bool SAL_CALL NestedKeyImpl::createLink( const OUString& aLinkName, const OU
             throw InvalidRegistryException();
         }
 
-        resolvedName = resolvedName + aLinkName.copy(lastIndex);
+        resolvedName += aLinkName.copy(lastIndex);
     }
     else
     {
@@ -882,7 +882,7 @@ void SAL_CALL NestedKeyImpl::deleteLink( const OUString& rLinkName )
             throw InvalidRegistryException();
         }
 
-        resolvedName = resolvedName + rLinkName.copy(lastIndex);
+        resolvedName += rLinkName.copy(lastIndex);
     }
     else
     {
@@ -925,7 +925,7 @@ OUString SAL_CALL NestedKeyImpl::getLinkTarget( const OUString& rLinkName )
             throw InvalidRegistryException();
         }
 
-        resolvedName = resolvedName + rLinkName.copy(lastIndex);
+        resolvedName += rLinkName.copy(lastIndex);
     }
     else
     {
diff --git a/stoc/source/implementationregistration/implreg.cxx b/stoc/source/implementationregistration/implreg.cxx
index c3d0f1e38820..730dd7febdd8 100644
--- a/stoc/source/implementationregistration/implreg.cxx
+++ b/stoc/source/implementationregistration/implreg.cxx
@@ -194,7 +194,7 @@ void prepareLink( const Reference < XSimpleRegistry > & xDest,
 
     if (pShortName)
     {
-        linkRefName = linkRefName + link.copy(pShortName - pTmpName + 1);
+        linkRefName += link.copy(pShortName - pTmpName + 1);
         linkName = link.copy(0, pShortName - pTmpName);
     }
 
@@ -515,7 +515,7 @@ void prepareUserKeys(const Reference < XSimpleRegistry >& xDest,
         OUString linkTarget = xKey->getLinkTarget(relativKey);
         OUString linkName(xKey->getKeyName().copy(xUnoKey->getKeyName().getLength()));
 
-        linkName = linkName + "/" + relativKey;
+        linkName += "/" + relativKey;
 
         if (bRegister)
         {
diff --git a/stoc/source/javavm/javavm.cxx b/stoc/source/javavm/javavm.cxx
index 71ffbb3fffb1..c6b3bd19dbf8 100644
--- a/stoc/source/javavm/javavm.cxx
+++ b/stoc/source/javavm/javavm.cxx
@@ -473,8 +473,7 @@ void getJavaPropsFromSafetySettings(
             case 3: sVal = "none";
                 break;
             }
-            OUString sProperty("appletviewer.security.mode=");
-            sProperty= sProperty + sVal;
+            OUString sProperty = "appletviewer.security.mode=" + sVal;
             pjvm->pushProp(sProperty);
         }
         css::uno::Reference<css::registry::XRegistryKey> key_CheckSecurity= xRegistryRootKey->openKey(
@@ -484,9 +483,9 @@ void getJavaPropsFromSafetySettings(
             bool val = static_cast<bool>(key_CheckSecurity->getLongValue());
             OUString sProperty("stardiv.security.disableSecurity=");
             if( val)
-                sProperty= sProperty + "false";
+                sProperty += "false";
             else
-                sProperty= sProperty + "true";
+                sProperty += "true";
             pjvm->pushProp( sProperty);
         }
     }
diff --git a/svx/qa/unit/customshapes.cxx b/svx/qa/unit/customshapes.cxx
index 4a1f3cb39c46..ad0e305bf6ca 100644
--- a/svx/qa/unit/customshapes.cxx
+++ b/svx/qa/unit/customshapes.cxx
@@ -380,14 +380,12 @@ CPPUNIT_TEST_FIXTURE(CustomshapesTest, testTdf115813_OOXML_XY_handle)
                   || (abs(nDesiredX - nObservedX) == 100 && abs(nDesiredY - nObservedY) <= 1)
                   || (abs(nDesiredX - nObservedX) <= 1 && abs(nDesiredY - nObservedY) <= 1)))
             {
-                sErrors += "\n";
-                //sErrors += OUString(sal_Unicode(10));
-                sErrors
-                    = sErrors + OUString::number(i) + " " + sShapeType + ": " + OUString::number(j);
-                sErrors = sErrors + " X " + OUString::number(nDesiredX) + "|"
-                          + OUString::number(nObservedX);
-                sErrors = sErrors + " Y " + OUString::number(nDesiredY) + "|"
-                          + OUString::number(nObservedY);
+                sErrors += "\n" +
+                           //sErrors += OUString(sal_Unicode(10));
+                           OUString::number(i) + " " + sShapeType + ": " + OUString::number(j)
+                           + " X " + OUString::number(nDesiredX) + "|"
+                           + OUString::number(nObservedX) + " Y " + OUString::number(nDesiredY)
+                           + "|" + OUString::number(nObservedY);
             }
         }
     }
diff --git a/svx/source/form/fmshimp.cxx b/svx/source/form/fmshimp.cxx
index 46547f22ad38..b17a794c79ff 100644
--- a/svx/source/form/fmshimp.cxx
+++ b/svx/source/form/fmshimp.cxx
@@ -2401,9 +2401,9 @@ IMPL_LINK(FmXFormShell, OnSearchContextRequest_Lock, FmSearchContext&, rfmscCont
                         // the cursor has a field matching the control source ?
                         if (xValidFormFields->hasByName(aName))
                         {
-                            strFieldList = strFieldList + aName + ";";
+                            strFieldList += aName + ";";
 
-                            sFieldDisplayNames = sFieldDisplayNames +
+                            sFieldDisplayNames +=
                                     ::comphelper::getString(xCurrentColModel->getPropertyValue(FM_PROP_LABEL)) +
                                     ";";
 
@@ -2431,10 +2431,10 @@ IMPL_LINK(FmXFormShell, OnSearchContextRequest_Lock, FmSearchContext&, rfmscCont
                     if (IsSearchableControl(xControl))
                     {
                         // all tests passed -> take along in the list
-                        strFieldList = strFieldList + sControlSource + ";";
+                        strFieldList += sControlSource + ";";
 
                         // the label which should appear for the control :
-                        sFieldDisplayNames = sFieldDisplayNames +
+                        sFieldDisplayNames +=
                                 getLabelName(Reference< XPropertySet>(xControlModel, UNO_QUERY)) +
                                 ";";
 
diff --git a/svx/source/form/fmsrcimp.cxx b/svx/source/form/fmsrcimp.cxx
index 6634c981616a..fb01b66e9524 100644
--- a/svx/source/form/fmsrcimp.cxx
+++ b/svx/source/form/fmsrcimp.cxx
@@ -805,7 +805,7 @@ void FmSearchEngine::SearchNextImpl()
                     strSearchExpression = "*" + strSearchExpression + "*";
                     break;
                 case MATCHING_BEGINNING :
-                    strSearchExpression = strSearchExpression + "*";
+                    strSearchExpression += "*";
                     break;
                 case MATCHING_END :
                     strSearchExpression = "*" + strSearchExpression;
diff --git a/svx/source/svdraw/presetooxhandleadjustmentrelations.cxx b/svx/source/svdraw/presetooxhandleadjustmentrelations.cxx
index e334bb06bdc2..0bf47ad64321 100644
--- a/svx/source/svdraw/presetooxhandleadjustmentrelations.cxx
+++ b/svx/source/svdraw/presetooxhandleadjustmentrelations.cxx
@@ -316,7 +316,7 @@ void PresetOOXHandleAdj::GetOOXHandleAdjRelation(
     rSecondAdjValueIndex = -1;
     if (sFullOOXShapeName.startsWith("ooxml-", &sKey))
     {
-        sKey = sKey + "_" + OUString::number(nHandleIndex);
+        sKey += "_" + OUString::number(nHandleIndex);
         HandleAdjRelHashMap::const_iterator aHashIter(s_HashMap.find(sKey));
         if (aHashIter != s_HashMap.end())
             sValue = (*aHashIter).second;
diff --git a/svx/source/svdraw/svdattr.cxx b/svx/source/svdraw/svdattr.cxx
index c9977fd44ff1..0a757b343c86 100644
--- a/svx/source/svdraw/svdattr.cxx
+++ b/svx/source/svdraw/svdattr.cxx
@@ -633,7 +633,7 @@ bool SdrFractionItem::GetPresentation(
 
         if(nDiv != 1)
         {
-            rText = rText + "/" + OUString::number(nDiv);
+            rText += "/" + OUString::number(nDiv);
         }
     }
     else
diff --git a/sw/qa/extras/globalfilter/globalfilter.cxx b/sw/qa/extras/globalfilter/globalfilter.cxx
index 0d60df55210b..b6af6e5ea1dc 100644
--- a/sw/qa/extras/globalfilter/globalfilter.cxx
+++ b/sw/qa/extras/globalfilter/globalfilter.cxx
@@ -780,7 +780,7 @@ void Test::testSkipImages()
     for (auto const & rFilterNamePair : aFilterNames)
     {
         bool bSkipImages = !rFilterNamePair.second.isEmpty();
-        OString sFailedMessage = OString("Failed on filter: ") + rFilterNamePair.first.toUtf8();
+        OString sFailedMessage = OStringLiteral("Failed on filter: ") + rFilterNamePair.first.toUtf8();
 
         if (mxComponent.is())
             mxComponent->dispose();
@@ -792,7 +792,7 @@ void Test::testSkipImages()
                     { "FilterOptions", uno::Any(rFilterNamePair.second) }
             }));
             mxComponent = loadFromDesktop(m_directories.getURLFromSrc(rFilterNamePair.first), "com.sun.star.text.TextDocument", args);
-            sFailedMessage = sFailedMessage + " - " + rFilterNamePair.second.toUtf8();
+            sFailedMessage += " - " + rFilterNamePair.second.toUtf8();
         }
         else
         {
diff --git a/sw/source/core/access/acctable.cxx b/sw/source/core/access/acctable.cxx
index 7094aeecbb01..6bb085d6a3bc 100644
--- a/sw/source/core/access/acctable.cxx
+++ b/sw/source/core/access/acctable.cxx
@@ -845,7 +845,7 @@ OUString SAL_CALL SwAccessibleTable::getAccessibleRowDescription(
             uno::Reference< XAccessibleText > xChildText( xChild, uno::UNO_QUERY );
             if ( xChildText.is() )
             {
-                sRowDesc = sRowDesc + xChildText->getText();
+                sRowDesc += xChildText->getText();
             }
         }
     }
@@ -878,7 +878,7 @@ OUString SAL_CALL SwAccessibleTable::getAccessibleColumnDescription(
             uno::Reference< XAccessibleText > xChildText( xChild, uno::UNO_QUERY );
             if ( xChildText.is() )
             {
-                sColumnDesc = sColumnDesc + xChildText->getText();
+                sColumnDesc += xChildText->getText();
             }
         }
     }
diff --git a/sw/source/filter/ww8/ww8par5.cxx b/sw/source/filter/ww8/ww8par5.cxx
index e39d0416c431..89335622da0f 100644
--- a/sw/source/filter/ww8/ww8par5.cxx
+++ b/sw/source/filter/ww8/ww8par5.cxx
@@ -3521,7 +3521,7 @@ eF_ResT SwWW8ImplReader::Read_F_Hyperlink( WW8FieldDesc* /*pF*/, OUString& rStr
     OSL_ENSURE(!sURL.isEmpty() || !sMark.isEmpty(), "WW8: Empty URL");
 
     if( !sMark.isEmpty() )
-        sURL = sURL + "#" + sMark;
+        sURL += "#" + sMark;
 
     SwFormatINetFormat aURL(sURL, sTarget);
     // If on loading TOC field, change the default style into the "index link"
diff --git a/sw/source/uibase/utlui/attrdesc.cxx b/sw/source/uibase/utlui/attrdesc.cxx
index f6f88080bab2..7c5d9bee918e 100644
--- a/sw/source/uibase/utlui/attrdesc.cxx
+++ b/sw/source/uibase/utlui/attrdesc.cxx
@@ -99,9 +99,8 @@ bool SwFormatCharFormat::GetPresentation
     if ( pCharFormat )
     {
         OUString aStr;
-        rText = SwResId( STR_CHARFMT );
         pCharFormat->GetPresentation( ePres, eCoreUnit, ePresUnit, aStr );
-        rText = rText + "(" + aStr + ")";
+        rText = SwResId( STR_CHARFMT ) + "(" + aStr + ")";
     }
     else
         rText = SwResId( STR_NO_CHARFMT );
@@ -158,8 +157,7 @@ bool SwFormatDrop::GetPresentation
         {
             rText = OUString::number( GetChars() ) + " ";
         }
-        rText = rText +
-                SwResId( STR_DROP_OVER ) +
+        rText += SwResId( STR_DROP_OVER ) +
                 " " +
                 OUString::number( GetLines() ) +
                 " " +
@@ -229,22 +227,22 @@ bool SwFormatFrameSize::GetPresentation
     rText = SwResId( STR_FRM_WIDTH ) + " ";
     if ( GetWidthPercent() )
     {
-        rText = rText + unicode::formatPercent(GetWidthPercent(),
+        rText += unicode::formatPercent(GetWidthPercent(),
             Application::GetSettings().GetUILanguageTag());
     }
     else
     {
-        rText = rText + ::GetMetricText( GetWidth(), eCoreUnit, ePresUnit, &rIntl ) +
+        rText += ::GetMetricText( GetWidth(), eCoreUnit, ePresUnit, &rIntl ) +
             " " + ::EditResId( ::GetMetricId( ePresUnit ) );
     }
     if ( ATT_VAR_SIZE != GetHeightSizeType() )
     {
         const char* pId = ATT_FIX_SIZE == m_eFrameHeightType ?
                                 STR_FRM_FIXEDHEIGHT : STR_FRM_MINHEIGHT;
-        rText = rText + ", " + SwResId(pId) + " ";
+        rText += ", " + SwResId(pId) + " ";
         if ( GetHeightPercent() )
         {
-            rText = rText + unicode::formatPercent(GetHeightPercent(),
+            rText += unicode::formatPercent(GetHeightPercent(),
                 Application::GetSettings().GetUILanguageTag());
         }
         else
@@ -327,7 +325,7 @@ bool SwFormatSurround::GetPresentation
 
     if ( IsAnchorOnly() )
     {
-        rText = rText + " " + SwResId( STR_SURROUND_ANCHORONLY );
+        rText += " " + SwResId( STR_SURROUND_ANCHORONLY );
     }
     return true;
 }
@@ -348,7 +346,7 @@ bool SwFormatVertOrient::GetPresentation
     {
         case text::VertOrientation::NONE:
         {
-            rText = rText + SwResId( STR_POS_Y ) + " " +
+            rText += SwResId( STR_POS_Y ) + " " +
                     ::GetMetricText( GetPos(), eCoreUnit, ePresUnit, &rIntl ) +
                     " " + EditResId( ::GetMetricId( ePresUnit ) );
         }
@@ -394,7 +392,7 @@ bool SwFormatHoriOrient::GetPresentation
     {
         case text::HoriOrientation::NONE:
         {
-            rText = rText + SwResId( STR_POS_X ) + " " +
+            rText += SwResId( STR_POS_X ) + " " +
                     ::GetMetricText( GetPos(), eCoreUnit, ePresUnit, &rIntl ) +
                     " " + EditResId( ::GetMetricId( ePresUnit ) );
         }
@@ -489,7 +487,7 @@ bool SwFormatCol::GetPresentation
         if ( COLADJ_NONE != GetLineAdj() )
         {
             const long nWdth = static_cast<long>(GetLineWidth());
-            rText = rText + " " + SwResId( STR_LINE_WIDTH ) + " " +
+            rText += " " + SwResId( STR_LINE_WIDTH ) + " " +
                     ::GetMetricText( nWdth, eCoreUnit,
                                       MapUnit::MapPoint, &rIntl );
         }
@@ -517,13 +515,13 @@ bool SwFormatURL::GetPresentation
     {
         if ( m_pMap )
             rText += " - ";
-        rText = rText + "URL: " + m_sURL;
+        rText += "URL: " + m_sURL;
         if ( m_bIsServerMap )
             rText += " (Server-Map)";
     }
     if ( !m_sTargetFrameName.isEmpty() )
     {
-        rText = rText + ", Target: " + m_sTargetFrameName;
+        rText += ", Target: " + m_sTargetFrameName;
     }
     return true;
 }
@@ -628,7 +626,7 @@ bool SwFormatLineNumber::GetPresentation
         rText += SwResId(STR_DONTLINECOUNT);
     if ( GetStartValue() )
     {
-        rText = rText + " " + SwResId(STR_LINCOUNT_START) +
+        rText += " " + SwResId(STR_LINCOUNT_START) +
                 OUString::number( GetStartValue() );
     }
     return true;
@@ -706,7 +704,7 @@ bool SwRotationGrf::GetPresentation(
         rText = SwResId( STR_ROTATION );
     else if( rText.getLength() )
         rText.clear();
-    rText = rText + OUString::number( GetValue() ) + "\xB0";
+    rText += OUString::number( GetValue() ) + "\xB0";
     return true;
 }
 
@@ -718,8 +716,8 @@ bool SwLuminanceGrf::GetPresentation(
         rText = SwResId( STR_LUMINANCE );
     else if( rText.getLength() )
         rText.clear();
-    rText = rText + unicode::formatPercent(GetValue(),
-        Application::GetSettings().GetUILanguageTag());
+    rText += unicode::formatPercent(GetValue(),
+                Application::GetSettings().GetUILanguageTag());
     return true;
 }
 
@@ -731,8 +729,8 @@ bool SwContrastGrf::GetPresentation(
         rText = SwResId( STR_CONTRAST );
     else if( rText.getLength() )
         rText.clear();
-    rText = rText + unicode::formatPercent(GetValue(),
-        Application::GetSettings().GetUILanguageTag());
+    rText += unicode::formatPercent(GetValue(),
+                Application::GetSettings().GetUILanguageTag());
     return true;
 }
 
@@ -757,8 +755,8 @@ bool SwChannelGrf::GetPresentation(
     }
     else if( rText.getLength() )
         rText.clear();
-    rText = rText + unicode::formatPercent(GetValue(),
-        Application::GetSettings().GetUILanguageTag());
+    rText += unicode::formatPercent(GetValue(),
+                Application::GetSettings().GetUILanguageTag());
     return true;
 }
 
@@ -796,7 +794,7 @@ bool SwTransparencyGrf::GetPresentation(
         rText = SwResId( STR_TRANSPARENCY );
     else if( rText.getLength() )
         rText.clear();
-    rText = rText + unicode::formatPercent(GetValue(),
+    rText += unicode::formatPercent(GetValue(),
         Application::GetSettings().GetUILanguageTag());
     return true;
 }
diff --git a/test/source/bootstrapfixture.cxx b/test/source/bootstrapfixture.cxx
index 6e06d352dec1..6279ec8d8633 100644
--- a/test/source/bootstrapfixture.cxx
+++ b/test/source/bootstrapfixture.cxx
@@ -211,8 +211,7 @@ void test::BootstrapFixture::validate(const OUString& rPath, test::ValidationFor
             sal_Int32 nStartOfNumber = nIndex + std::strlen("Grand total of errors in submitted package: ");
             OUString aNumber = aContentOUString.copy(nStartOfNumber);
             sal_Int32 nErrors = aNumber.toInt32();
-            OString aMsg("validation error in OOXML export: Errors: ");
-            aMsg = aMsg + OString::number(nErrors);
+            OString aMsg = "validation error in OOXML export: Errors: " + OString::number(nErrors);
             if(nErrors)
             {
                 SAL_WARN("test", aContentOUString);
diff --git a/vcl/source/gdi/mtfxmldump.cxx b/vcl/source/gdi/mtfxmldump.cxx
index c5d2dfaa4c6c..efc8dfc5b999 100644
--- a/vcl/source/gdi/mtfxmldump.cxx
+++ b/vcl/source/gdi/mtfxmldump.cxx
@@ -68,7 +68,7 @@ OUString collectPushFlags(PushFlags nFlags)
     aString = aStrings[0];
     for (size_t i = 1; i < aStrings.size(); ++i)
     {
-        aString = aString + ", " + aStrings[i];
+        aString += ", " + aStrings[i];
     }
     return aString;
 }
@@ -121,7 +121,7 @@ OUString convertDrawTextFlagsToString(DrawTextFlags eDrawTextFlags)
     aString = aStrings[0];
     for (size_t i = 1; i < aStrings.size(); ++i)
     {
-        aString = aString + " " + aStrings[i];
+        aString += " " + aStrings[i];
     }
     return aString;
 };
diff --git a/vcl/source/uitest/logger.cxx b/vcl/source/uitest/logger.cxx
index 861cc4f4fb8e..2ab6026de4af 100644
--- a/vcl/source/uitest/logger.cxx
+++ b/vcl/source/uitest/logger.cxx
@@ -256,11 +256,11 @@ void UITestLogger::logKeyInput(VclPtr<vcl::Window> const& xUIElement, const KeyE
         }
         if (aParentID.isEmpty())
         {
-            aContent = aContent + "Type on '" + rID + "' " + aKeyCode;
+            aContent += "Type on '" + rID + "' " + aKeyCode;
         }
         else
         {
-            aContent = aContent + "Type on '" + rID + "' " + aKeyCode + " from " + aParentID;
+            aContent += "Type on '" + rID + "' " + aKeyCode + " from " + aParentID;
         }
     }
     else if (pUIObject->get_type() == "SwEditWinUIObject" && rID == "writer_edit")
diff --git a/vcl/source/window/builder.cxx b/vcl/source/window/builder.cxx
index 87b6a740502f..70641bf724ee 100644
--- a/vcl/source/window/builder.cxx
+++ b/vcl/source/window/builder.cxx
@@ -429,7 +429,7 @@ VclBuilder::VclBuilder(vcl::Window* pParent, const OUString& sUIDir, const OUStr
     sal_Int32 nIdx = m_sHelpRoot.lastIndexOf('.');
     if (nIdx != -1)
         m_sHelpRoot = m_sHelpRoot.copy(0, nIdx);
-    m_sHelpRoot = m_sHelpRoot + OString('/');
+    m_sHelpRoot += OString('/');
 
     OUString sUri = sUIDir + sUIFile;
 
diff --git a/vcl/source/window/tabdlg.cxx b/vcl/source/window/tabdlg.cxx
index 1a308f12c7f7..47212cb7fc8a 100644
--- a/vcl/source/window/tabdlg.cxx
+++ b/vcl/source/window/tabdlg.cxx
@@ -252,7 +252,7 @@ std::vector<OString> TabDialog::getAllPageUIXMLDescriptions() const
                         {
                             // add the PageId to be able to detect the correct tabPage in
                             // selectPageByUIXMLDescription below
-                            aNewName = aNewName + "|" + OString::number(nPageId);
+                            aNewName += "|" + OString::number(nPageId);
                         }
 
                         aRetval.push_back(aNewName);
diff --git a/vcl/unx/generic/printer/cupsmgr.cxx b/vcl/unx/generic/printer/cupsmgr.cxx
index ea4dd308d58e..a6d1ccbad7bb 100644
--- a/vcl/unx/generic/printer/cupsmgr.cxx
+++ b/vcl/unx/generic/printer/cupsmgr.cxx
@@ -872,8 +872,8 @@ bool CUPSManager::endSpool( const OUString& rPrintername, const OUString& rJobTi
                 "    option " << pOptions[n].name << "=" << pOptions[n].value);
 #if OSL_DEBUG_LEVEL > 1
         OString aCmd( "cp " );
-        aCmd = aCmd + it->second.getStr();
-        aCmd = aCmd + OString( " $HOME/cupsprint.ps" );
+        aCmd += it->second.getStr();
+        aCmd += OString( " $HOME/cupsprint.ps" );
         system( aCmd.getStr() );
 #endif
 
diff --git a/vcl/unx/gtk3/gtk3gtkinst.cxx b/vcl/unx/gtk3/gtk3gtkinst.cxx
index 9dd62384c2da..59066bde6502 100644
--- a/vcl/unx/gtk3/gtk3gtkinst.cxx
+++ b/vcl/unx/gtk3/gtk3gtkinst.cxx
@@ -11675,7 +11675,7 @@ public:
         sal_Int32 nIdx = m_sHelpRoot.lastIndexOf('.');
         if (nIdx != -1)
             m_sHelpRoot = m_sHelpRoot.copy(0, nIdx);
-        m_sHelpRoot = m_sHelpRoot + OUString('/');
+        m_sHelpRoot += OUString('/');
         m_aUtf8HelpRoot = OUStringToOString(m_sHelpRoot, RTL_TEXTENCODING_UTF8);
         m_aIconTheme = Application::GetSettings().GetStyleSettings().DetermineIconTheme();
         m_aUILang = Application::GetSettings().GetUILanguageTag().getBcp47();
diff --git a/vcl/unx/gtk3/gtk3gtksalmenu.cxx b/vcl/unx/gtk3/gtk3gtksalmenu.cxx
index 5431ea4010ac..6fb544de2642 100644
--- a/vcl/unx/gtk3/gtk3gtksalmenu.cxx
+++ b/vcl/unx/gtk3/gtk3gtksalmenu.cxx
@@ -31,9 +31,9 @@ static bool bUnityMode = false;
  */
 static gchar* GetCommandForItem(GtkSalMenu* pParentMenu, sal_uInt16 nItemId)
 {
-    OString aCommand("window-");
-    aCommand = aCommand + OString::number(reinterpret_cast<unsigned long>(pParentMenu));
-    aCommand = aCommand + "-" + OString::number(nItemId);
+    OString aCommand = "window-" +
+        OString::number(reinterpret_cast<unsigned long>(pParentMenu)) +
+        "-" + OString::number(nItemId);
     return g_strdup(aCommand.getStr());
 }
 
diff --git a/writerfilter/source/dmapper/DomainMapper_Impl.cxx b/writerfilter/source/dmapper/DomainMapper_Impl.cxx
index 6f6f74457486..f69b53fbf2fe 100644
--- a/writerfilter/source/dmapper/DomainMapper_Impl.cxx
+++ b/writerfilter/source/dmapper/DomainMapper_Impl.cxx
@@ -5170,7 +5170,7 @@ void DomainMapper_Impl::SetFieldResult(OUString const& rResult)
                                 OUString titleStr;
                                 uno::Any aValue(propertyVal.Value);
                                 aValue >>= titleStr;
-                                titleStr = titleStr + rResult;
+                                titleStr += rResult;
                                 propertyVal.Value <<= titleStr;
                                 aValues[nTitleFoundIndex] = propertyVal;
                             }
diff --git a/xmlhelp/source/treeview/tvread.cxx b/xmlhelp/source/treeview/tvread.cxx
index 6a6ea52552b9..f0331dea7a29 100644
--- a/xmlhelp/source/treeview/tvread.cxx
+++ b/xmlhelp/source/treeview/tvread.cxx
@@ -665,7 +665,7 @@ ConfigData TVChildTarget::init( const Reference< XComponentContext >& xContext )
         locale = "en-US";
         ret = "en";
         }
-    url = url + ret;
+    url += ret;
 
     // first of all, try do determine whether there are any *.tree files present
 
diff --git a/xmloff/source/text/txtprhdl.cxx b/xmloff/source/text/txtprhdl.cxx
index 0bcc3d3ea8ba..32644e5f7f1c 100644
--- a/xmloff/source/text/txtprhdl.cxx
+++ b/xmloff/source/text/txtprhdl.cxx
@@ -546,7 +546,7 @@ bool XMLFrameProtectPropHdl_Impl::exportXML(
         }
         else
         {
-            rStrExpValue = rStrExpValue + " " + sVal;
+            rStrExpValue += " " + sVal;
         }
     }
     else if( rStrExpValue.isEmpty() )
@@ -775,7 +775,7 @@ bool XMLGrfMirrorPropHdl_Impl::exportXML(
         }
         else
         {
-            rStrExpValue = rStrExpValue + " " + sVal;
+            rStrExpValue += " " + sVal;
         }
     }
     else if( rStrExpValue.isEmpty() )