bug#9409: 24.0.50; log-view-msg-prev, easy-mmode

[Stefan Monnier]

> I patched `easy-mmode-define-navigation' as above and tested (marked
> as X) the most functions without any trouble.

> * diff-mode.el
>   - [X] diff-hunk-prev
>   - [X] diff-hunk-next
>   - [X] diff-file-prev
>   - [X] diff-file-next

> * log-view.el
>   - [X] log-view-msg-prev
>   - [X] log-view-msg-next
>   - [ ] log-view-file-prev
>   - [ ] log-view-file-next

> * smerge-mode
>   - [ ] smerge-next
>   - [ ] smerge-prev

> * cvs-status
>   - [X] cvs-status-next
>   - [X] cvs-status-prev

If a problem shows up it's not going to be in the *-prev commands, but
in commands that call those functions internally.  So you need to check
the callers of diff-hunk-prev, diff-file-prev, etc..
It's always good to check with actual testing, but it's also important
to check by looking at the code.  IIUC this will be safe because in the
case where the behavior is changed, the function signals an error, so
only callers which catch this error (with condition-case) might
be affected.


        Stefan