Merge pull request #1019 from baojjeu/master

Improve README.md

Author: joaomdmoura

README.md

@@ -23,7 +23,7 @@ architecture. We'd love your help. [Learn how you can help here.](https://github
 ## Example
 
 Given two models, a `Post(title: string, body: text)` and a
-`Comment(name:string, body:text, post_id:integer)`, you will have two
+`Comment(name: string, body: text, post_id: integer)`, you will have two
 serializers:
 
 ```ruby