[issue1686] string.Template.safe_substitute fail when overriding pattern attribute

[Ilan Schnell]

Changes by Ilan Schnell <ilanschnell at gmail.com>:


----------
assignee:  -> barry
nosy: +barry
priority:  -> normal
type:  -> behavior

__________________________________
Tracker <report at bugs.python.org>
<http://bugs.python.org/issue1686>
__________________________________