bug#5105: 23.1; doc string of facemenu-set-face

[Stefan Monnier]

> general.  For buffers it's usually handy to use the name and the buffer
> object itself interchangeably, but I don't see any reason to do the same

Actually, that's also a source of subtle issues.  In Emacs, we sometimes
use the distinction between names and buffers so that M-x
rename-uniquely can be used (together with some other command) to create
a new buffer.
And indeed, the difference between names and buffers is still relevant
when we rename buffers.


        Stefan