MDL-81919 core: Update moved file namespaces

lib/classes/exception/coding_exception.php

@@ -14,12 +14,14 @@
 // You should have received a copy of the GNU General Public License
 // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
 
+namespace core\exception;
+
 /**
  * Exception indicating programming error, must be fixed by a programer. For example
  * a core API might throw this type of exception if a plugin calls it incorrectly.
  *
  * @package    core
- * @subpackage lib
+ * @subpackage exception
  * @copyright  2008 Petr Skoda  {@link http://skodak.org}
  * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
@@ -34,3 +36,8 @@ class coding_exception extends moodle_exception {
         parent::__construct('codingerror', 'debug', '', $hint, $debuginfo);
     }
 }
+
+// Alias this class to the old name.
+// This file will be autoloaded by the legacyclasses autoload system.
+// In future all uses of this class will be corrected and the legacy references will be removed.
+class_alias(coding_exception::class, \coding_exception::class);