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/pythonscanner.h

@@ -29,8 +29,7 @@
 
 #include <QString>
 
-namespace Python {
-namespace Internal {
+namespace Python::Internal {
 
 /**
  * @brief The Scanner class - scans source code for highlighting only
@@ -95,5 +94,4 @@ private:
     int m_state;
 };
 
-} // namespace Internal
-} // namespace Python
+} // Python::Internal