[1.2.X] Fixed #13747 -- Reverted documentation suggesting the use of...

[1.2.X] Fixed #13747 -- Reverted documentation suggesting the use of self.stdout/err in management commands in 1.2. Thanks to metamemetics for the report.

Strictly, self.stdout/err is a feature addition; however, it's a
feature that is required in order to achieve a massive speedup in the
tests and to maintain parity between 1.2.X and trunk tests. However,
the feature is completely transparent -- the old technique will work
fine, it just isn't as testable. Therefore, we'll treat this as an
undocumented feature in the 1.2 branch.

git-svn-id: http://code.djangoproject.com/svn/django/branches/releases/1.2.X@13364 bcc190cf-cafb-0310-a4f2-bffc1f526a37