Slightly improved the help text for the "Password" field in the `auth.User`...

Slightly improved the help text for the "Password" field in the `auth.User` admin form, and PEP8-cleaned up the area while I was there.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17326 bcc190cf-cafb-0310-a4f2-bffc1f526a37