Author: Tim Hunt
MDL-20636 Fix type respones -> response. Thanks Colin. #415
http://git.moodle.org/gw?p=moodle.git;a=commit;h=b3ae5457c40b881288bc9133a0ef18743f91f3de
http://github.com/moodle/moodle/commit/b3ae5457c40b881288bc9133a0ef18743f91f3de
+ 2.1 en [responseformat,qtype_essay]