Revise description of dumbdbm.open() to reflect that the flag argument is ignored and that mode was ignored before Python 2.2. This closes SF bug #490098.
Revise description of dumbdbm.open() to reflect that the flag argument is
ignored and that mode was ignored before Python 2.2.
This closes SF bug #490098.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator