SAK-26176 Correct typos in en_GB locale.

git-svn-id: https://source.sakaiproject.org/svn/assignment/trunk@309002 66ffb92e-73f9-0310-93c1-f5514f145a0a
SAK-26176 Revert of changes that shouldn't have gone in.

git-svn-id: https://source.sakaiproject.org/svn/assignment/trunk@309003 66ffb92e-73f9-0310-93c1-f5514f145a0a