Author: Tim Hunt
MDL-27200 missing {} in various lang strings.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=404e01f59eddaf71ccc0a747e43f8bf0062ce6d7
http://github.com/moodle/moodle/commit/404e01f59eddaf71ccc0a747e43f8bf0062ce6d7
+ 2.2 en [gradeforstudent,core_grades]
+ 2.2 en [failedtoconnect,mod_lti]
+ 2.2 en [lti_errormsg,mod_lti]
+ 2.2 en [missingparameterserror,mod_lti]
+ 2.2 en [hexanotallowed,qtype_calculated]