updated: use null coalescing operator for landmark and landmark_selector in violation handling

Author: SteveJonesDev

includes/classes/class-rest-api.php

@@ -380,8 +380,8 @@ public function set_post_scan_results( $request ) {
 						 */
 						do_action( 'edac_before_rule', $post_id, $actual_rule_id, 'js' );
 
-						$landmark          = isset( $violation['landmark'] ) ? $violation['landmark'] : null;
-						$landmark_selector = isset( $violation['landmarkSelector'] ) ? $violation['landmarkSelector'] : null;
+						$landmark          = $violation['landmark'] ?? null;
+						$landmark_selector = $violation['landmarkSelector'] ?? null;
 
 						( new Insert_Rule_Data() )->insert( $post, $actual_rule_id, $impact, $html, $landmark, $landmark_selector );