bpo-30398: Add a docstring for re.error. (#1647)
Also document that some attributes may be None.
S
Serhiy Storchaka committed
12d6b5d156377c0877931a03ef2439dccb2f3711
Parent: 5becf38
Committed by GitHub <noreply@github.com>
on 5/27/2017, 1:12:48 PM