Make the first usage example less confusing

[ci skip]

README.md

@@ -16,26 +16,26 @@ generation process is fraught with conditionals and loops. Here's a simple
 example:
 
 ``` ruby
-Jbuilder.encode do |json|
-  json.content format_content(@message.content)
-  json.(@message, :created_at, :updated_at)
-
-  json.author do
-    json.name @message.creator.name.familiar
-    json.email_address @message.creator.email_address_with_name
-    json.url url_for(@message.creator, format: :json)
-  end
+# app/views/message/show.json.jbuilder
 
-  if current_user.admin?
-    json.visitors calculate_visitors(@message)
-  end
+json.content format_content(@message.content)
+json.(@message, :created_at, :updated_at)
 
-  json.comments @message.comments, :content, :created_at
+json.author do
+  json.name @message.creator.name.familiar
+  json.email_address @message.creator.email_address_with_name
+  json.url url_for(@message.creator, format: :json)
+end
 
-  json.attachments @message.attachments do |attachment|
-    json.filename attachment.filename
-    json.url url_for(attachment)
-  end
+if current_user.admin?
+  json.visitors calculate_visitors(@message)
+end
+
+json.comments @message.comments, :content, :created_at
+
+json.attachments @message.attachments do |attachment|
+  json.filename attachment.filename
+  json.url url_for(attachment)
 end
 ```