Author: Tim Hunt
MDL-27200 missing {} in various lang strings.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=658ad69fa061c91412268e7605fa05166bd1f523
http://github.com/moodle/moodle/commit/658ad69fa061c91412268e7605fa05166bd1f523
+ 2.3 en [gradeforstudent,core_grades]
+ 2.3 en [failedtoconnect,mod_lti]
+ 2.3 en [lti_errormsg,mod_lti]
+ 2.3 en [missingparameterserror,mod_lti]
+ 2.3 en [hexanotallowed,qtype_calculated]