What is emacs MRev mode?

Question

I could not find anything relevant after searching "MRev", so I hope someone can offer a tip.

Here is a picture below, viewing .css code in Text mode with Flyspell minor mode. MRev does not disappear when changing files, so it appears to be a minor mode.

Answer 1

It is magit-auto-revert-mode. You can disable it by following expression.

(magit-auto-revert-mode -1)