bug#26564: Document that only functions and not variables can end with "-p"

[Michael Heerdegen]

Drew Adams <drew.adams@oracle.com> writes:

> I suggest we stay away from helper verbs (or even any words).
> Verbs, in particular, can be different for singular and plural
> (e.g. `fancy-candidates-p').

It's a matter of taste.  I like when symbols have names that speak to
me, even when there is no clear rule of how to name them.  The most
important thing is that you see how the binding is intended to be used.


Michael.