Richard Stallman <rms@gnu.org> writes:

>     I may be off-topic, but is there any warning somewhere in the doc
>     about C-M-<backspace> (the default magic key to kill X)?
>
> We no longer document that as an Emacs command, so there is no conflict.

Ok.  I just forgot that C-M- wasn't always the same as <ESC> C- .

However, I thought that the aim of the addition in commands.texi was
more general than that, a warning like « Don't use them when you
create a new mode, for instance ».

Never mind, and thanks.

-- 
 |      Michaėl `Micha' Cadilhac     |  To be portable,                       |
 |         Epita/LRDE Promo 2007     |    Just stay on Windows.               |
 |  http://michael.cadilhac.name     |                                        |
 `--JID: michael.cadilhac@gmail.com--'          -- A Microsoft Guy       -  --'