adjust php demo indentation

Author: marijnh

mode/php/index.html

@@ -21,9 +21,9 @@ <h1>CodeMirror 2: PHP mode</h1>
 
 <form><textarea id="code" name="code">
 <?php
-	function hello($who) {
-		return "Hello " . $who;
-	}
+function hello($who) {
+	return "Hello " . $who;
+}
 ?>
 <p>The program says <?= hello("World") ?>.</p>
 <script>