Fixed #5730: Conditionally escape widget contents in newforms to avoid

inadvertent double-escaping. This still isn't perfect behaviour (since it's
unaware of the current context's auto-escaping setting), but that's a larger
problem that needs fixing and this change at least makes the existing
behaviour consistent. Patch from SmileyChris.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@6722 bcc190cf-cafb-0310-a4f2-bffc1f526a37