Author: dinhloc
MDL-61033 quiz: Editing a quiz while a preview is open
Editing a quiz while a preview is open in another browser tab can leads to a cryptic error that is hard to recover from
http://git.moodle.org/gw?p=moodle.git;a=commit;h=f4695ec722b80e86abca08aceba8f30f9167aab2
http://github.com/moodle/moodle/commit/f4695ec722b80e86abca08aceba8f30f9167aab2
+ 3.5 en [attempterrorinvalid,mod_quiz]
+ 3.5 en [attempterrorcontentchange,mod_quiz]
+ 3.5 en [attempterrorcontentchangeforuser,mod_quiz]