Fix subheading

patterns/20.dependency-injection.md

@@ -83,7 +83,8 @@ The title is hidden in a middle layer (higher-order component) where we pass it
 That's all nice but it solves only half of the problem.
 Now we don't have to pass the title down the tree but how this data will reach the enhance.jsx helper.
 
-Using React's context
+## Using React's context
+
 React has the concept of context. The context is something that every component may have access to.
 It's something like an event bus but for data. A single model which we can access from everywhere.