Re: inputting characters by hexadigit

[Alfred M. Szmidt]

C-M-q is a terrible keybinding to choose, it tends to mean "fill
current defun" in whatever language specific mode you are in; and is
used in many modes making it quite pointless to use it for inserting
characters by hex.  Inserting chars. by hex is also not the most
common thing to have, so having a single chord for it seems silly.

I liked the proposal of using M-#, one could allow other input formats
as well:

C-q M-# xff
C-q M-# b01010101
C-q M-# o157

and would be a good mnemonic...