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
2978	QueryDict.urlencode() doesnt quote &	Joakim Sernbrant <serbaut@…>	Adrian Holovaty	"QueryDict.urlencode should return
{{{
        return '&amp;'.join(output)
}}}
instead of
{{{
        return '&'.join(output)
}}}

From the tidy doc:

{{{
All special characters in HREF should be encoded. ""&"" is a reserved character to begin an entity. (ex: &nsbp).
""&"" in HREF field should be encoded as his equivalent entity ""&amp;"", even when used as a separator for
parameters in the URL. Before to make you an opinion about this, please read carefully
[http://ppewww.ph.gla.ac.uk/%7Eflavell/www/formgetbyurl.html]page.
}}}
"	defect	closed	Core (Other)	dev	normal	invalid	urlencode		Design decision needed	0	0	0	0	0	0