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.cpp

@@ -25,11 +25,9 @@
 
 #include "pythonscanner.h"
 
-#include "pythonconstants.h"
-#include "pythonplugin.h"
+#include <QSet>
 
-namespace Python {
-namespace Internal {
+namespace Python::Internal {
 
 Scanner::Scanner(const QChar *text, const int length)
     : m_text(text), m_textLength(length), m_state(0)
@@ -399,5 +397,4 @@ void Scanner::parseState(State &state, QChar &savedData) const
     savedData = static_cast<ushort>(m_state);
 }
 
-} // namespace Internal
-} // namespace Python
+} // Python::Internal