Fix issues:

+ improve formatting
+ remove superfluous semicolons
+ comment unused parameters
+ rename Initialisation to Initialization
+ rename Deinitialisation to Finalization
+ remove spaces

src/App/OriginGroupExtension.cpp

@@ -137,4 +137,4 @@ EXTENSION_PROPERTY_SOURCE_TEMPLATE(App::OriginGroupExtensionPython, App::OriginG
 
 // explicit template instantiation
 template class AppExport ExtensionPythonT<GroupExtensionPythonT<OriginGroupExtension>>;
-}
+}