Author: Tim Hunt
MDL-77327 qtype_ddmarker: remove use of unnecessary undeclared field
Also:
* Fix some incorrect punctuation in two strings.
* Add a test to verify that this change does not cause a regression.
* Improve some PHPdoc comments.
http://git.moodle.org/gw?p=moodle.git;a=commit;h=0458c69d0d5945c91f24f063deb8fb44ef2116b8
http://github.com/moodle/moodle/commit/0458c69d0d5945c91f24f063deb8fb44ef2116b8
+ 4.2 en [followingarewrong,qtype_ddmarker]
+ 4.2 en [followingarewrongandhighlighted,qtype_ddmarker]