Re: Manipulating keymaps

Stefan,

On Tuesday, 2026-06-16 10:33:16 -0400, you wrote:

> ...
> I don't think `M-q` ever ran `fill-region` by default.
> I'll assume you meant `fill-paragraph` or `fill-paragraph-or-region`.

May well be.   I no longer have  Emacs 28.2 installed,  so I can't check
what "M-q"  was bound to,  and at least  "fill-paragraph-or-region" does
not exist in Emacs 30.2.

> ...
> But `prog-fill-reindent-defun` is meant to "do what you mean", so maybe
> you should report the specific cases where you used `M-q` and it did not
> do what you intended, so we can improve it.

Here goes:

   $ emacs -Q lorem-ipsum

   ; Emacs will open a window in "Fundamental" mode.   Enter the follow-
   ; ing text:

   #! /usr/bin/bash
   #
   # lorem ipsum, dolor sit amet consectetur adipisci velit, sed eius modi tempora incidunt, ut labore et dolore magnam aliquam.

   ; Position the cursor on the "#" character preceding "lorem", and en-
   ; ter "C-<blank> <down> C-u M-q", which results in

   #! /usr/bin/bash
   #
   # lorem ipsum, dolor sit amet  consectetur adipisci velit, sed eius modi
     tempora incidunt, ut labore et dolore magnam aliquam.

   ; (because this is still "Fundamental" mode).  Manually add the miss-
   ; ing comment symbol in the last line:

   #! /usr/bin/bash
   #
   # lorem ipsum, dolor sit amet  consectetur adipisci velit, sed eius modi
   # tempora incidunt, ut labore et dolore magnam aliquam.

   ; Now enter "C-s C-c" to terminate Emacs, and open this file in Emacs
     again:

   $ emacs -Q lorem-ipsum

   ; This time the  file is opened  using mode  "Shell-script[bash]" and
   ; key "M-q" is bound to  "prog-fill-reindent-defun".   Now change the
   ; file's contents to

   #! /usr/bin/bash
   #
   # lorem ipsum, dolor sit amet  consectetur adipisci velit, ONE, TWO, THREE, sed eius modi
   # tempora incidunt, ut labore et dolore magnam aliquam.

   ; Again place the cursor on the "#" character preceding "lorem",  en-
   ; ter "C-<blank> <down> <down> C-u M-q"  to again re-format these two
   ; lines, BUT NOTHING HAPPENS,  the two lines don't change.   However,
   ; if you again place the cursor  on the "#" character  preceding "lo-
   ; rem"  and enter  "C-<blank> <down> <down> C-u M-x fill-region"  the
   ; two lines WILL BE re-formatted.  And that's what I want to happen.

Sincerely,
  Rainer