I have the following bindings:
M-q => fill-paragraph
M-S-q => unfill-paragraph
But either key combo results in the first: fill-paragraph, so it
appears that the Shift and thus
unfill is ignored. I set the
second myself:
(prelude-require-package 'unfill)
(define-key prelude-mode-map "\M-\S-q" nil) ; don't let prelude dictate it
(global-set-key (kbd "M-S-q") 'unfill-paragraph)
There is a behavior of Emacs to fall back to an unshifted sequence
when the shifted version does not exist (this seems good, but should
not be happening for this case). So if I didn't have the M-S-q
binding, then pressing that should result in fill-paragraph, which
is what I'm unhappily seeing. This suggests that somehow Emacs
doesn't know about the second binding. But I've verified that it does
know with C-h f unfill-paragraph confirming it. Invoking from
M-x shows it working well.
Why is the Shift being ignored?
(This is the GUI version of Emacs and my Shift keys work fine for other things.)
Emacs has some confusing problems w.r.t handling of shift, since the shift modifier is sometimes treated like a normal modifier but other times is special-cased to modify the base char so it's upper-cased.
In this case, I think you'll need ?\M-Q. In contrast, ?\C-Q is the same as ?\C-q so you need to use ?\C-S-q to bind something to C-S-q.
This probably deserves a M-x report-emacs-bug.