Prevent plugin runs to use the moodle.Commenting.TodoComment sniff

That sniff covers the core coding style and verifies that all the
TODOs (inline or phpdoc block), have a MDL issue associated.

But that's not a requirements for plugins, hence disabling
that Sniff for them.

Fixes moodlehq#266

src/Command/CodeCheckerCommand.php

@@ -79,6 +79,15 @@ protected function execute(InputInterface $input, OutputInterface $output): int
         // @codeCoverageIgnoreEnd
 
         $exclude = $input->getOption('exclude');
+
+        // There are some differences in the checks performed when the code to
+        // check is a plugin or a Moodle core directory. And, here, we are always
+        // checking a plugin, so we need to exclude some checks that are not
+        // applicable.
+        // TODO: If https://github.com/moodlehq/moodle-cs/issues/92 becomes implemented, then
+        // we'll just have to change to the new, plugins specific, standard and forget.
+        $exclude .= (!empty($exclude) ? ',' : '') . 'moodle.Commenting.TodoComment';
+
         $cmd     = array_merge($basicCMD, [
             '--standard=' . ($input->getOption('standard') ?: 'moodle'),
             '--extensions=php',

tests/Fixture/moodle-local_ci/lib.php

@@ -22,6 +22,9 @@
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 
+// TODO: This todo comment without any MDL link is good for moodle-plugin-ci
+// (because we disable the moodle.Commenting.TodoComment sniff for plugins).
+
 /**
  * Add
  *