Minor doc change

Author: Pierre-Luc Tessier Gagné

doc/interfaces.rst

@@ -25,10 +25,10 @@ The available interfaces are:
    interfaces/virtual
 
 Additional interfaces can be added via a plugin interface. An external package
-can register a new interface by using the `python_can.interface` entry point.
+can register a new interface by using the ``python_can.interface`` entry point.
 
-The format of the entry point is `interface_name=module:classname` where
-`classname` is a can.BusABC implementation.
+The format of the entry point is ``interface_name=module:classname`` where
+``classname`` is a :class:`can.BusABC` concrete implementation.
 
 ::