Tests: Correct failure messages for some tests.

Follow-up to [54176], [57548], [58328].

Props poena, SergeyBiryukov.
See #62280.

git-svn-id: https://develop.svn.wordpress.org/trunk@59822 602fd350-edb4-49c9-b593-d223f7449a82

Author: SergeyBiryukov

tests/phpunit/tests/fonts/font-library/wpRestFontFamiliesController.php

@@ -236,7 +236,7 @@ public function test_get_items_by_slug() {
 		$data     = $response->get_data();
 
 		$this->assertSame( 200, $response->get_status(), 'The response status should be 200.' );
-		$this->assertCount( 1, $data, 'There should be 2 properties in the response data.' );
+		$this->assertCount( 1, $data, 'There should be 1 property in the response data.' );
 		$this->assertArrayHasKey( 'id', $data[0], 'The id property should exist in the response data.' );
 		$this->assertSame( $font_family->ID, $data[0]['id'], 'The id should match the expected ID in the response data.' );
 	}

tests/phpunit/tests/rest-api/rest-themes-controller.php

@@ -427,7 +427,7 @@ public function test_get_item_schema() {
 		$this->assertArrayHasKey( 'responsive-embeds', $theme_supports );
 		$this->assertArrayHasKey( 'title-tag', $theme_supports );
 		$this->assertArrayHasKey( 'wp-block-styles', $theme_supports );
-		$this->assertCount( 24, $theme_supports, 'There should be 23 theme supports' );
+		$this->assertCount( 24, $theme_supports, 'There should be 24 theme supports' );
 	}
 
 	/**