handle projects path with apostrophe (fixes #12691)

Author: jef-n

src/app/qgisapp.cpp

@@ -10065,11 +10065,15 @@ void QgisApp::projectChanged( const QDomDocument &doc )
 
   QString expr;
   if ( !prevProjectDir.isNull() )
-    expr = QString( "sys.path.remove('%1'); " ).arg( prevProjectDir );
+  {
+    QString prev = prevProjectDir;
+    expr = QString( "sys.path.remove('%1'); " ).arg( prev.replace( "'", "\\'" ) );
+  }
 
   prevProjectDir = fi.canonicalPath();
 
-  expr += QString( "sys.path.append('%1')" ).arg( prevProjectDir );
+  QString prev = prevProjectDir;
+  expr += QString( "sys.path.append('%1')" ).arg( prev.replace( "'", "\\'" ) );
 
   QgsPythonRunner::run( expr );
 }

src/core/qgsfield.h

@@ -163,7 +163,7 @@ Q_DECLARE_METATYPE( QgsField );
  *
  * In addition to storing a list of QgsField instances, it also:
  * - allows quick lookups of field names to index in the list
- *- keeps track of where the field definition comes from (vector data provider, joined layer or newly added from an editing operation)
+ * - keeps track of where the field definition comes from (vector data provider, joined layer or newly added from an editing operation)
  * \note QgsFields objects are implicitly shared.
  */
 class CORE_EXPORT QgsFields