There is plenty of room for improvement :)

For example, I was lazy and did not create a name for the function.

Thanks for the patch!

Moved the fix to its own function (so plugins are able to remove the filter), and prepared for release. Please have a look if it works as expected after the changes.

I came here via this support thread for the Classic Editor plugin, and I can confirm that this fixes that issue as well.

The revised code seems good, and I like the type check before using strpos.

• With this update, the script comes from the plugin, with translations. When clicking "Enregistrer le brouillon", the button text remains "Enregistrer le brouillon".
• Clicking category 1 does not affect 10+ or 100+, and clicking 2 does not affect 20+ or 200+ (same behavior as current/previous version).
• When I activated this and the Hotfix plugin, Hotfix 1.3 overrode Classic Editor, without translations.
• When I activated this at classic-editor and the current/previous version at classic-editor166, the script came from the newer plugin (with translations).

Thanks @jonathanbossenger and @sabernhardt for confirming.

I like the type check before using strpos.

Yea, technically $src can be false (denotes a group of scripts).