bug#22694: 25.0.91; dired-mark-files-containing-regexp read file disk

[Tino Calancha]

Thank you very much for your response.

> Making the doc string more explicit about this aspect is indeed a good
> idea.  I've just did it on the emacs-25 branch.
Thanks.  The doc. string is very clear now.
Certainly the function name is very suggestive about what the function
should do, so may be people who will not read the doc and still suffer
the issue... (i know, they should read the doc.).

> As for your scenario: when you work with logfiles, or any other kind
> of files that get updated regularly behind Emacs's back, you should
> turn on auto-revert-mode or auto-revert-tail-mode in the buffers of
> those files.  Then the buffer's contents will be synchronized with the
> relevant files on disk, and the problem you describe would not exist.
Thank you for the advise.  Definitely i need to use one of these options.

> Bottom line, I don't think I agree with permanently changing the
> implementation along the lines you suggest, as that would be against
> the general principles (AFAIK them) of Dired's design, and actually
> also against the general principles of Emacs design vis-a-vis files
> and buffers that visit them: we don't automatically sync a buffer with
> the file it visits, and we don't automatically look on disk when the
> file's buffer differs from what's on disk.
I have no comment on this: i am not expert enough.

> I guess we could have an option to switch to the behavior you would
> like to see, but such an option, if we introduce it, IMO should not be
> specific to this command, it should affect all the Dired commands
> which might produce different results when buffers are not
> auto-reverted.
I like this way.  I may work on implement such option if you want.