Docs: Standardize filter docs in core classes in wp-includes/* to use third-person singular verbs per the inline documentation standards for PHP.

See #36913.


git-svn-id: https://develop.svn.wordpress.org/trunk@37492 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/class-wp-role.php

@@ -96,7 +96,7 @@ class WP_Role {
 	 */
 	public function has_cap( $cap ) {
 		/**
-		 * Filter which capabilities a role has.
+		 * Filters which capabilities a role has.
 		 *
 		 * @since 2.0.0
 		 *