bug#4178: 23.1; doc bug, Elisp manual: notion of font family is not explained

[Chong Yidong]

Lars Magne Ingebrigtsen <larsi@gnus.org> writes:

> Chong Yidong <cyd@stupidchicken.com> writes:
>
>>> Various parts of the Elisp manual refer to font families, but this
>>> concept is nowhere explained (defined).
>>
>> I don't think it's the place of the Emacs manual to define every single
>> operating system concept, especially one as self-explanatory as "font
>> family".  But if it makes you happy, I can add it to the glossary.
>
> I can't seem to find it in the glossary.  On the other hand, I think
> this is something that doesn't really belong in the manual.

I added a couple of xrefs to the Fonts node in the Emacs manual, from
which the meaning of "font families" should be obvious.  Closing the
bug.