bug#18083: 24.4.50; (emacs) Arguments and (elisp) Prefix Command Arguments

[Drew Adams]

> > Both of these nodes speak of `M--', `M-3', etc.  They should also
> > mention the equivalent `C--', `C-3', etc.
> 
> I wonder whether the reason they aren't mentioned is that they're
> deprecated or something?  Anybody know?

No, they are not deprecated.  Presumably they are not mentioned
because they are not available in some Emacs terminal sessions.

That doesn't mean we shouldn't mention them - we should just
point out that they might not be available in some contexts.

They are particularly handy if you are using prefix args
a lot or repetitively, as they use the same modifier as `C-u'.
And they are somewhat easier for some people to type on some
(common) keyboards.