[Bug libstdc++/59687] The description of ios::noreplace is hilarious

[giecrilj at stegny dot 2a.pl]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=59687

--- Comment #1 from Christopher Yeleighton <giecrilj at stegny dot 2a.pl> ---
(In reply to Christopher Yeleighton from comment #0)
> Also inconsistent with the table at filebuf::open that does not mention "x"
> mode to be actually used.

Oops, scratch that, I had "noreplace" in mind.