remove trailing whitespace

doing it in 1.3 as well to avoid possible later conflicts

src/plugins/qt4projectmanager/qt4projectmanagerplugin.cpp

@@ -103,7 +103,7 @@ static Core::Command *createSeparator(Core::ActionManager *am,
 bool Qt4ProjectManagerPlugin::initialize(const QStringList &arguments, QString *errorMessage)
 {
     Q_UNUSED(arguments)
- 
+
     Core::ICore *core = Core::ICore::instance();
     if (!core->mimeDatabase()->addMimeTypes(QLatin1String(":qt4projectmanager/Qt4ProjectManager.mimetypes.xml"), errorMessage))
         return false;