Fix eeschema single part per line bom generation.

eeschema/dialogs/dialog_build_BOM.cpp

@@ -468,7 +468,7 @@ void DIALOG_BUILD_BOM::CreatePartsList( )
     cmplist.RemoveSubComponentsFromList();
 
     // sort component list by value
-    cmplist.SortByValueAndRef( );
+    cmplist.SortByValueOnly( );
     PrintComponentsListByPart( f, cmplist, false );
 
     fclose( f );
@@ -872,14 +872,14 @@ int DIALOG_BUILD_BOM::PrintComponentsListByPart( FILE* aFile, SCH_REFERENCE_LIST
     while( index < aList.GetCount() )
     {
         SCH_COMPONENT *component = aList[index].GetComponent();
-        wxString referenceListStr;
+        wxArrayString referenceStrList;
         int qty = 1;
-        referenceListStr.append( aList[index].GetRef() );
+        referenceStrList.Add( aList[index].GetRef() );
         for( unsigned int i = index+1; i < aList.GetCount(); )
         {
             if( *(aList[i].GetComponent()) == *component )
             {
-                referenceListStr.append( wxT( " " ) + aList[i].GetRef() );
+                referenceStrList.Add( aList[i].GetRef() );
                 aList.RemoveItem( i );
                 qty++;
             }
@@ -887,10 +887,22 @@ int DIALOG_BUILD_BOM::PrintComponentsListByPart( FILE* aFile, SCH_REFERENCE_LIST
                 i++; // Increment index only when current item is not removed from the list
         }
 
-        // Write value, quantity and list of references
-        fprintf( aFile, "%15s%c%3d%c\"%s\"", TO_UTF8( component->GetField( VALUE )->GetText() ),
-                 s_ExportSeparatorSymbol, qty,
-                 s_ExportSeparatorSymbol, TO_UTF8( referenceListStr ) );
+        referenceStrList.Sort( RefDesStringCompare ); // Sort references for this component
+
+        // Write value, quantity
+        fprintf( aFile, "%15s%c%3d", TO_UTF8( component->GetField( VALUE )->GetText() ),
+                 s_ExportSeparatorSymbol, qty );
+
+        // Write list of references
+        for( int i = 0; i < referenceStrList.Count(); i++ )
+        {
+            if( i == 0 )
+                fprintf( aFile, "%c\"%s", s_ExportSeparatorSymbol, TO_UTF8( referenceStrList[i] ) );
+            else
+                fprintf( aFile, " %s", TO_UTF8( referenceStrList[i] ) );
+        }
+        if( referenceStrList.Count() )
+            fprintf( aFile, "\"" );
 
         // Write the rest of the fields if required
 #if defined( KICAD_GOST )