Singleton.md

@@ -4,7 +4,7 @@ A singleton is a class that can be **instantiated only once**: this can be very
 
 In boardcore, you can achieve this by extending the Singleton template which you can find in `src/shared/`.
 
-### Interface
+## Methods
 The Singleton interface is a template class which exposes a single method:
 ```cpp
 inline static T* getInstance()
@@ -17,7 +17,7 @@ What this method does is:
 - If an instance of this class already exists, return that instance.
 - If an instance of this class does not exist yet, create and return a new one.
 
-### Example
+## Example
 
 From the `Singleton.h` comment:
 ```cpp