Coding Standards: Document intentional `case` block fall-throughs.

Fixes `PSR2.ControlStructures.SwitchDeclaration.TerminatingComment` violations.

See #45934.



git-svn-id: https://develop.svn.wordpress.org/trunk@44565 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-admin/includes/upgrade.php

@@ -1749,6 +1749,7 @@ function upgrade_330() {
 			$sidebars_widgets                   = $_sidebars_widgets;
 			unset( $_sidebars_widgets );
 
+			// intentional fall-through to upgrade to the next version.
 		case 2:
 			$sidebars_widgets                  = retrieve_widgets();
 			$sidebars_widgets['array_version'] = 3;

src/wp-admin/post.php

@@ -205,6 +205,7 @@ switch ( $action ) {
 
 		wp_update_attachment_metadata( $post_id, $newmeta );
 
+		// Intentional fall-through to trigger the edit_post() call.
 	case 'editpost':
 		check_admin_referer( 'update-post_' . $post_id );
 

src/wp-admin/user-edit.php

@@ -173,6 +173,7 @@ switch ( $action ) {
 			exit;
 		}
 
+		// Intentional fall-through to display $errors.
 	default:
 		$profileuser = get_user_to_edit( $user_id );
 

src/wp-includes/general-template.php

@@ -655,6 +655,7 @@ function get_bloginfo( $show = '', $filter = 'raw' ) {
 					'<code>url</code>'
 				)
 			);
+			// Intentional fall-through to be handled by the 'url' case.
 		case 'url':
 			$output = home_url();
 			break;