id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
1108	[patch] if a IN b filter	scum	Adrian Holovaty	"I've been missing the `If In` functinality in the templating system.  Attached is an in_ fiter that adds that functionality.

Returns True if `a` is found in list `b`. False if not found.  
{{ a|in:b }}or {{ isThisValue|in:thisListOfValues }}
"	enhancement	closed	Template system		normal	wontfix	in filter		Design decision needed	1	0	0	0	0	0