API handles strings automatically when array type given

Author: adamsilverstein

src/wp-includes/rest-api/endpoints/class-wp-rest-comments-controller.php

@@ -1681,7 +1681,7 @@ public function get_collection_params() {
 			'default'           => 'approve',
 			'description'       => __( 'Limit result set to comments assigned a specific status. Requires authorization.' ),
 			'sanitize_callback' => 'sanitize_key',
-			'type'              => array( 'string', 'array' ),
+			'type'              => 'array',
 			'validate_callback' => 'rest_validate_request_arg',
 		);