Author: Tim Hunt
MDL-20636 Fix a bunch of minor errors in the truefalse preview.
Most significantly, all behaviours now work.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=cce1b6556cb380b8bb295a4568421e1a3cd645d5
http://github.com/moodle/moodle/commit/cce1b6556cb380b8bb295a4568421e1a3cd645d5
+ 2.1 en [gradingdetails,qbehaviour_adaptive]
+ 2.1 en [gradingdetailsadjustment,qbehaviour_adaptive]
+ 2.1 en [gradingdetailspenalty,qbehaviour_adaptive]
+ 2.1 en [howcertainareyou,qbehaviour_deferredcbm]
+ 2.1 en [triesremaining,qbehaviour_interactive]
+ 2.1 en [hexanotallowed,qtype_calculated]