"setup" is a noun or adjective, "set up" is the verb

Also, I don´t see any need for this to be capitalized

Author: Carlos Granados

cookbook/event_dispatcher/before_after_filters.rst

@@ -1,7 +1,7 @@
 .. index::
    single: EventDispatcher
 
-How to Setup before and after Filters
+How to set up before and after Filters
 =====================================
 
 It is quite common in web application development to need some logic to be