Added bullet to docs/contributing.txt about creating diffs from the top-level trunk directory
Added bullet to docs/contributing.txt about creating diffs from the top-level trunk directory

--HG--
extra : convert_revision : svn%3Abcc190cf-cafb-0310-a4f2-bffc1f526a37/django/trunk%406078

adieu/django-nonrel,adieu/django-nonrel,adieu/django-nonrel