Python: Convert to Tr::tr

Change-Id: I0241053b0d51dbb1a60c43351cbff543fd52573d
Reviewed-by: Eike Ziller <eike.ziller@qt.io>
Reviewed-by: <github-actions-qt-creator@cristianadam.eu>

src/plugins/python/pythoneditor.h

@@ -27,8 +27,7 @@
 
 #include <texteditor/texteditor.h>
 
-namespace Python {
-namespace Internal {
+namespace Python::Internal {
 
 class PythonEditorFactory : public TextEditor::TextEditorFactory
 {
@@ -36,5 +35,4 @@ public:
     PythonEditorFactory();
 };
 
-} // namespace Internal
-} // namespace Python
+} // Python::Internal