Re: vc-follow-symlinks confirm message is not read only

[Richard Stallman]

    When visiting a symbolic link to a file under CVS control and
    vc-follow-symlinks's value is ask, Emacs display following message:

            "Symbolic link to CVS-controlled source file; follow link? "

    This message is not read only, so you delete it to press DEL key.

I ran the same call to yes-or-no-p and did not see this problem,
using the code as of some days ago.  Has a bug in yes-or-no-p
been introduced recently?