* Fix coalesce on postgres.
* The edit icon's alt shows the HTML entities causing
* enrol/tests/behat/add_to_group.feature Contains a '@doit' tag which I assume is there from testing.
* group/classes/output/user_groups_editable.php
** Missing MOODLE_INTERNAL check.
** Unused variables context_system and moodle_exception.
** The PHPDocs for the constructors are wrong.
** export_for_template() returns an array, not stdClass (according to parent docs).
** Change moodle_exception to coding_exception at the beginning.
* group/lib.php
** Missing docs for core_group_inplace_editable().
* user/classes/participants_table.php
** The docs for the class variables $groups, $course and $context need a '\' beforehand as they are in a namespace.
** I would prefer $this->context = $context; and $this->groups = ... to be done at the end of the constructor with the other class variable assignments.
** You could get rid of the class variable courseid if we are setting course and use $this->course->id instead.
** The function col_groups has @param \stdclass $row but it should be $data
* lib/amd/src/form-autocomplete.js and lib/amd/src/inplace_editable.js
** Some issues here CiBot has pointed out.
* lib/classes/output/inplace_editable.php
** @see should be on a new line.
