I’d open a bug if the file is writable by non-root users. Here I think the warning wants to say: remove the writable bit also for the file owner (namely root) so he remembers to not use vi and calls visudo instead.
I think PRs are enough in this case. The cosmetic fix will be available with the next packages release. No hurry.
However feel free to open a bug if you’re ready to fix them! Surely it’s not a bad idea 