MDL-45100 fix course_context classname PHPDdos typo in context API

lib/accesslib.php

@@ -5652,7 +5652,7 @@ abstract class context extends stdClass implements IteratorAggregate {
      * Is this context part of any course? If yes return course context.
      *
      * @param bool $strict true means throw exception if not found, false means return false if not found
-     * @return course_context context of the enclosing course, null if not found or exception
+     * @return context_course context of the enclosing course, null if not found or exception
      */
     public function get_course_context($strict = true) {
         if ($strict) {
@@ -6791,7 +6791,7 @@ class context_course extends context {
      * Is this context part of any course? If yes return course context.
      *
      * @param bool $strict true means throw exception if not found, false means return false if not found
-     * @return course_context context of the enclosing course, null if not found or exception
+     * @return context_course context of the enclosing course, null if not found or exception
      */
     public function get_course_context($strict = true) {
         return $this;
@@ -7257,7 +7257,7 @@ class context_block extends context {
      * Is this context part of any course? If yes return course context.
      *
      * @param bool $strict true means throw exception if not found, false means return false if not found
-     * @return course_context context of the enclosing course, null if not found or exception
+     * @return context_course context of the enclosing course, null if not found or exception
      */
     public function get_course_context($strict = true) {
         $parentcontext = $this->get_parent_context();

lib/deprecatedlib.php

@@ -4021,7 +4021,7 @@ function get_context_url(context $context) {
  * @deprecated since 2.2
  * @see context::get_course_context()
  * @param context $context
- * @return course_context context of the enclosing course, null if not found or exception
+ * @return context_course context of the enclosing course, null if not found or exception
  */
 function get_course_context(context $context) {
     debugging('get_course_context() is deprecated, please use $context->get_course_context(true) instead.', DEBUG_DEVELOPER);