Merge pull request #144 from rieschl/book

fix small, but evil typo; markup style

Author: weierophinney

doc/book/middleware.md

@@ -53,10 +53,10 @@ $route = Literal::factory([
 
 Middleware may be provided as PHP callables, or as service names.
 
-> ### No action required
->
-> Unlike action controllers, middleware typically is single purpose, and, as
-> such, does require a default `action` parameter.
+### No action required
+
+Unlike action controllers, middleware typically is single purpose, and, as
+such, does not require a default `action` parameter.
 
 ## Middleware services