Added test for #5361

tests/unit/framework/helpers/HtmlTest.php

@@ -39,6 +39,7 @@ class HtmlTest extends TestCase
     public function testEncode()
     {
         $this->assertEquals("a&lt;&gt;&amp;&quot;&#039;<EFBFBD>", Html::encode("a<>&\"'\x80"));
+        $this->assertEquals('Sam &amp; Dark', Html::encode('Sam & Dark'));
     }
 
     public function testDecode()