Git commits in Moodle 2.7.4 by Paul Holden

commit 23f202a2b89700f3a0b26c6a751aab2e63835a3a
Author: Paul Holden <pholden@greenhead.ac.uk>
Date:   Thu, 13 Nov 2014 16:20:16 +0800
Tag:    v2.7.4

MDL-44657 forms: Form identifiers should only contain basic characters