Merge branch 'master' of github.com:prerender/prerender_rails

Author: thoop

Diff for: README.md

@@ -139,7 +139,7 @@ Or on heroku:
 As an alternative, you can pass `prerender_service_url` in the options object during initialization of the middleware
 
 ``` ruby
-config.middleware.use Rack::Prerender, prerender_service_url: '<new url>'
+config.middleware.use Rack::Prerender, prerender_service_url: '<new url>'
 ```
 
 ## License