Re: dynamic-completion-table

[Richard Stallman <rms@gnu.org>]

      "Use function FUN as a dynamic completion table.
    FUN is called with one argument, the string for which completion is required,
    and it should return an alist containing all the intended possible
    completions.

Is FUN required to return only the possible completions of that
string, or can it ignore the string and always return the full list of
possibilities?  Looking at the code, I think it can ignore the string.
The doc string should say so.

Both macros seem useful--you can install them.  Don't forget to
mention them in etc/NEWS.