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
17383	template filter arguments don't tolerate whitespace	adrian_nye@…	nobody	"
This generates an error:

{{ today|date: ""SHORT_DATE_FORMAT"" }}

but this doesn't:

{{ today|date:""SHORT_DATE_FORMAT"" }}

Since there is a colon ending the filter name and a quote beginning the argument, it seems like the whitespace could be ignored.   This would make the template easier to read and use, which is especially important in the templates since this is where non-programmers are most likely to be contributing.
"	Cleanup/optimization	closed	Template system	1.3	Normal	wontfix			Unreviewed	0	0	0	0	0	0