Fixed #12849 -- Corrected the way strings are encoded for display by the...

Fixed #12849 -- Corrected the way strings are encoded for display by the colorizer so that they work with unicode. Thanks to jype for the report, and frasern for his work on the issue.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@12803 bcc190cf-cafb-0310-a4f2-bffc1f526a37