In the question_multianswer_edit_form.php, the is the following comment
//TODO would be nice to parse the question text here and output some error
//messages if there is a problem with the text.
So the code was modified to allow the user to ask for DECODE AND VERIFY THE QUESTION TEXT.
The display shows all the questions and questions elements (questiontext, grade,answer, feedback) and the possible errors . He can then correct his questiontext before saving.
The same validation is done when saving.
There is no modification to the multianswer/questiontype.php
The file attached should be CVS soon to 2.0 after final verifications