Fix accidentally creating a tuple

< vjanelle>  549                     print type(str(allowsg.id))
< vjanelle>  550 kwargs['src_security_group_group_id'] = str(allowsg.id),
< vjanelle>  551                     print type(kwargs['src_security_group_group_id'])
< vjanelle> <type 'str'>
< vjanelle> <type 'tuple'>
< AeroNotix> 550 str(..),
< AeroNotix> notice the trailing comma
< AeroNotix> that makes it a tuple
< vjanelle> oh
< AeroNotix> Done *that* before
< AeroNotix> lolz
< okeuday1> yeah, that is annoying
< vjanelle> AeroNotix: thanks
< vjanelle> AeroNotix: I do not know how long that would've taken me to figure out
< AeroNotix> vjanelle: such an innocuous little thing.
< AeroNotix> vjanelle: it should be a syntax error imho