Remove wrapping on data provider and rename to functional semantics.

Author: dmsnell

tests/phpunit/tests/pluggable/wpMail.php

@@ -598,26 +598,20 @@ public function test_wp_mail_can_send_embedded_images( $embeds ) {
 	 */
 	public static function data_wp_mail_can_send_embedded_images() {
 		return array(
-			'Mixed Array Embeds'       => array(
-				'embeds' => array(
-					'canola' => DIR_TESTDATA . '/images/canola.jpg',
-					DIR_TESTDATA . '/images/test-image-2.gif',
-					DIR_TESTDATA . '/images/avif-lossy.avif',
-				),
+			'Named embed + unnamed embeds' => array(
+				'canola' => DIR_TESTDATA . '/images/canola.jpg',
+				DIR_TESTDATA . '/images/test-image-2.gif',
+				DIR_TESTDATA . '/images/avif-lossy.avif',
 			),
-			'Associative Array Embeds' => array(
-				'embeds' => array(
-					'canola'       => DIR_TESTDATA . '/images/canola.jpg',
-					'test-image-2' => DIR_TESTDATA . '/images/test-image-2.gif',
-					'avif-lossy'   => DIR_TESTDATA . '/images/avif-lossy.avif',
-				),
+			'All named embeds'             => array(
+				'canola'       => DIR_TESTDATA . '/images/canola.jpg',
+				'test-image-2' => DIR_TESTDATA . '/images/test-image-2.gif',
+				'avif-lossy'   => DIR_TESTDATA . '/images/avif-lossy.avif',
 			),
-			'Indexed Array Embeds'     => array(
-				'embeds' => array(
-					DIR_TESTDATA . '/images/canola.jpg',
-					DIR_TESTDATA . '/images/test-image-2.gif',
-					DIR_TESTDATA . '/images/avif-lossy.avif',
-				),
+			'All unnamed embeds'           => array(
+				DIR_TESTDATA . '/images/canola.jpg',
+				DIR_TESTDATA . '/images/test-image-2.gif',
+				DIR_TESTDATA . '/images/avif-lossy.avif',
 			),
 		);
 	}