mypy: Add type: ignores for optparse.OptionGroup.

Typeshed has already fixed this upstream (Description is optional)

bin/zulip-send

@@ -78,7 +78,7 @@ def main(argv=None):
     parser.add_option('-m', '--message',
                       help='Specifies the message to send, prevents interactive prompting.')
 
-    group = optparse.OptionGroup(parser, 'Stream parameters')
+    group = optparse.OptionGroup(parser, 'Stream parameters') # type: ignore # https://github.com/python/typeshed/pull/1248
     group.add_option('-s', '--stream',
                      dest='stream',
                      action='store',

bots/jabber_mirror_backend.py

@@ -360,7 +360,7 @@ option does not affect login credentials.'''.replace("\n", " "))
                       const=logging.DEBUG,
                       default=logging.INFO)
 
-    jabber_group = optparse.OptionGroup(parser, "Jabber configuration")
+    jabber_group = optparse.OptionGroup(parser, "Jabber configuration") # type: ignore # https://github.com/python/typeshed/pull/1248
     jabber_group.add_option(
         '--jid',
         default=None,

zulip/__init__.py

@@ -105,7 +105,7 @@ def _default_client():
 
 def generate_option_group(parser, prefix=''):
     # type: (optparse.OptionParser, str) ->  optparse.OptionGroup
-    group = optparse.OptionGroup(parser, 'Zulip API configuration')
+    group = optparse.OptionGroup(parser, 'Zulip API configuration') # type: ignore # https://github.com/python/typeshed/pull/1248
     group.add_option('--%ssite' % (prefix,),
                      dest="zulip_site",
                      help="Zulip server URI",