Changed various non-breaking space characters from [17478] to use the code...

Changed various non-breaking space characters from [17478] to use the code representation rather than the actual character, which is too hard to overlook because it just looks like a space

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17542 bcc190cf-cafb-0310-a4f2-bffc1f526a37