4 changes in this PR:
1) Fixed bug with saving translations to py files - saving sources and comments it didn't add `repr` for the saved strings which was producing unexpected special characters.
Then these special characters sometimes made `translations.py` invalid (e.g., it was failing to load with some `\u` combinations) or was producing invalid characters in .po files created from the `translations.py`.
2) `find_best_messages_matches` used to fail when current message context wasn't found in the .po file. E.g. there were no messages with context "View3D", "Operator", ... and you would try to edit translation for the element that uses that context. I've added a fallback to empty sets to make sure it won't fail and just return the valid result that there are no matches.
3) added minor typing hint for easier code navigation.
4) added print to make it clear what data is printed.
Pull Request: https://projects.blender.org/blender/blender/pulls/116934
a8e14af167