[1.0.X] Fixed #9883: no longer do strange things with whitespace in the...

[1.0.X] Fixed #9883: no longer do strange things with whitespace in the linebreaks filter. Thanks, keithb.

Backport of r10225 from trunk.


git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.0.X@10292 bcc190cf-cafb-0310-a4f2-bffc1f526a37