minor #418 Fix the 'Invalid encoding' class name validation test. (adrienlucas)

This PR was merged into the 1.0-dev branch.

Discussion
----------

Fix the 'Invalid encoding' class name validation test.

I don't know why this test was written like that, and I did not find other way to fix it...
Hope I'm not missing something.

Commits
-------

ca0afe9 Fix the 'Invalid encoding' class name validation test.

Author: weaverryan

tests/ValidatorTest.php

@@ -66,7 +66,7 @@ public function testInvalidClassName()
     public function testInvalidEncodingInClassName()
     {
         $this->expectException(RuntimeCommandException::class);
-        $this->expectExceptionMessage('"�Controller" is not a UTF-8-encoded string.');
-        Validator::validateClassName(mb_convert_encoding('Ś', 'ISO-8859-2', 'UTF-8'));
+        $this->expectExceptionMessage(sprintf('"%sController" is not a UTF-8-encoded string.', chr(0xA6)));
+        Validator::validateClassName(mb_convert_encoding('ŚController', 'ISO-8859-2', 'UTF-8'));
     }
 }