Merge pull request faye#105 from CodeBlock/patch-1

Add a missing space in between two words ;)

site/src/pages/ruby.haml

@@ -140,7 +140,7 @@
     since this allows you to use asynchronous logic to make your modifications.
 
     As an example, suppose we want to authenticate subscription messages by
-    checking an authentication token against a list we're keepingin a file on
+    checking an authentication token against a list we're keeping in a file on
     disk. Clients subscribe to channels by sending a message to the
     @/meta/subscribe@ channel with the channel they want to subscribe in the
     @subscription@ field. Let's say our authentication file contains a JSON