intern-soft, find-face/get-face, and facep for determining faces' definedness

[Stephen J. Turnbull]

Warning: per previous post, emacs-devel trimmed.

>>>>> "StefanF" == Stefan Monnier <monnier at iro.umontreal.ca> writes:

    StefanF> It was "why does XEmacs do it this way".

    StefanF> I'd thus expect that (facep foo) should return non-nil
    StefanF> iff foo can be passed to set-face-<bar> and similar
    StefanF> functions.

I would imagine that set-face-<bar> was originally intended to signal
an error if passed a symbol, but we implemented the current interface
solely for GNU compatibility.  I personally would much prefer the
stricter interface, and allow use strings as face names, with symbols
being coerced to their print-names.


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