Add setting to modify the prefix or suffix of the backup files?

[excetara2]

I was using the auto-save plugin and it allows you to put something like File.auto-save.py which I thought was a nice feature so was the ability to do this might be nice feature to have so you know every file was an auto backup file.

[Abelarm]

I'd like to work on this can you assing it to me?

[akalongman]

@Abelarm feel free to work on this 👍