404.erb in mango-0.7.0

- old
+ new

@@ -1,8 +1,8 @@
 <!DOCTYPE html>
 <html>
   <head>
-    <meta charset='utf-8' />
+    <meta charset='utf-8'>
     <title>404 Page</title>
   </head>
   <body>
     <h1>Page not found</h1>
     <p id='template'><%= "404.erb" %></p>