Fix some doxygen issues

sources/undocommand/addelementtextcommand.cpp

@@ -116,6 +116,7 @@ AddTextsGroupCommand::AddTextsGroupCommand(Element *element,
 /**
 	@brief AddTextsGroupCommand::AddTextsGroupCommand
 	@param element : The element to add a new group
+	@param groupe_name
 	@param texts_list : a list of texts to add to the created group
 	(texts must be child of element)
 	@param parent : parent undo

sources/undocommand/changeelementinformationcommand.cpp

@@ -26,6 +26,7 @@
 	@param elmt : element to change information
 	@param old_info : old info of element
 	@param new_info : new info of element
+	@param parent
 */
 ChangeElementInformationCommand::ChangeElementInformationCommand(
 		Element *elmt,