Php-cs-fixer Changes

Its latest update added some new stringencies, resulting in 62 messages. Used `composer fix` to take care of them.

tests/bootstrap.php

@@ -25,13 +25,13 @@ function phpunit10ErrorHandler(int $errno, string $errstr, string $filename, int
             return true; // message suppressed - stop error handling
         }
 
-        throw new \Exception("$errstr $filename $lineno");
+        throw new Exception("$errstr $filename $lineno");
     }
 
     return false; // continue error handling
 }
 
-if (!method_exists(\PHPUnit\Framework\TestCase::class, 'setOutputCallback')) {
+if (!method_exists(PHPUnit\Framework\TestCase::class, 'setOutputCallback')) {
     ini_set('error_reporting', (string) E_ALL);
     set_error_handler('phpunit10ErrorHandler');
 }