Fix lintian error in manpages.

Fixes a lintian I: message about improper use of minus instead
of a hyphen.

The Debian/Ubuntu maintainers have been keeping this as a diff,
and couldn't be bothered to contribute it upstream.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@17808 bcc190cf-cafb-0310-a4f2-bffc1f526a37

docs/man/django-admin.1

@@ -194,7 +194,7 @@ The domain of the message files (default: "django") when using makemessages.
 .TP
 .I \-e, \-\-extension=EXTENSION
 The file extension(s) to examine (separate multiple
-extensions with commas, or use -e multiple times) (makemessages command).
+extensions with commas, or use \-e multiple times) (makemessages command).
 .TP
 .I \-s, \-\-symlinks
 Follows symlinks to directories when examining source code and templates for