bug#36989: 26.2; Doc string of `y-or-n-p': say it returns nil if answer is not `y' or `DEL'

[Noam Postavsky]

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

> Subject line says it all.  The doc says only that it returns `t' if the
> answer is `y'.  It should also say what it returns if the answer is no
> (not `y' or `DEL').

Did you miss where it says:

    Return t if answer is "y" and nil if it is "n".
                                  ^^^^^^^^^^^^^^^^