bug#7137: two dashes appear after long y-or-n-p's

[jidanni]

On Thu, Sep 30, 2010 at 01:08:39PM +0200, Eli Zaretskii wrote:
> Probably the result of revno 101415:
> 
>   2010-09-12  Stefan Monnier  <monnier@iro.umontreal.ca>
> 
>         * subr.el (y-or-n-p): New function, moved from src/fns.c; use 
> read-key.
> 
> It causes read_key_sequence to be called, which calls echo_prompt,
> which calls echo_now, which calls echo_dash, which displays the
> dashes.
Well they look terrible.