Removed trailing slashes on void elements

Author: leigh-ross

Form-Controls/index.html

@@ -1,11 +1,11 @@
 <!DOCTYPE html>
 <html lang="en">
   <head>
-    <meta charset="utf-8" />
-    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
+    <meta charset="utf-8">
+    <meta http-equiv="X-UA-Compatible" content="IE=edge">
     <title>My form exercise</title>
-    <meta name="description" content="" />
-    <meta name="viewport" content="width=device-width, initial-scale=1" />
+    <meta name="description" content="">
+    <meta name="viewport" content="width=device-width, initial-scale=1">
   </head>
   <body>
     <header>