Coding Standards: Fix the remaining issues in /tests.

All PHP files in `/tests` now conform to the PHP coding standards, or have exceptions appropriately marked.

Travis now also runs `phpcs` on the `/tests` directory, any future changes to these files must conform entirely to the WordPress PHP coding standards. 🎉

See #47632.



git-svn-id: https://develop.svn.wordpress.org/trunk@45607 602fd350-edb4-49c9-b593-d223f7449a82

tests/phpunit/tests/compat.php

@@ -125,10 +125,10 @@ EOT;
 			'string',
 			$heredoc,
 			// object data
-			new classA(),
-			// undefined data
+			new ClassA(),
+			// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged -- intentionally undefined data
 			@$undefined_var,
-			// unset data
+			// phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged -- intentionally unset data
 			@$unset_var,
 		);
 		$outputs  = array(
@@ -315,7 +315,7 @@ EOT;
 }
 
 /* used in test_mb_substr_phpcore */
-class classA {
+class ClassA {
 	public function __toString() {
 		return 'Class A object';
 	}