On 2016-08-30 11:12, Eli Zaretskii wrote: >> From: Rolf Ade >> Date: Tue, 30 Aug 2016 03:23:02 +0200 >> >>> Thanks. Can you describe the use case(s) where this is important? >> >> Version control. > > If the only use case is version-controlled files, perhaps we should > enable this feature only for buffers that visit version-controlled > files? Another case: a Makefile may generate a.x automatically from b.x. If b.x is updated, a.x will be regenerated on the next run. If a.x was already open in Emacs, Emacs will prompts if the user tries to change it, even if a.x didn't actually change as a result of the re-generation. a.x is not likely to be version-controlled, since it's auto-generated. Cheers, Clément.