Tiny grammar fix in createsuperuser command.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16154 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/auth/management/commands/createsuperuser.py

@@ -85,7 +85,7 @@ class Command(BaseCommand):
                     if not username:
                         input_msg = 'Username'
                         if default_username:
-                            input_msg += ' (Leave blank to use %r)' % default_username
+                            input_msg += ' (leave blank to use %r)' % default_username
                         username = raw_input(input_msg + ': ')
                     if default_username and username == '':
                         username = default_username