[docs] [issue28951] re.flags not documented in Module Contents as promised.

R. David Murray added the comment: Making a 'flags' subheading in module contents would be reasonable. Alternatively we could just drop that parenthetical, since the descriptions for each flag are themselves cross-linked. ---------- _______________________________________ Python tracker <report@bugs.python.org> <http://bugs.python.org/issue28951> _______________________________________