libstdc++/3955: ostringstream behaves poorly with openmode ios::app

[pme@gcc.gnu.org]

Synopsis: ostringstream behaves poorly with openmode ios::app

Responsible-Changed-From-To: unassigned->pme
Responsible-Changed-By: pme
Responsible-Changed-When: Sun Mar  3 09:54:21 2002
Responsible-Changed-Why:
    Mine.
State-Changed-From-To: open->closed
State-Changed-By: pme
State-Changed-When: Sun Mar  3 09:54:21 2002
State-Changed-Why:
    Sorry this took so long...  this is fixed for 3.1 and
    later releases.

http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=3955