Update constants.rst to test documentation.

docs/constants.rst

@@ -30,12 +30,12 @@ Race
 
 .. class:: library.Race
 
-   The folllowing three values represent actual races
+   The following three values represent actual races:
    
    .. attribute:: Race.Protoss
    .. attribute:: Race.Terran
    .. attribute:: Race.Zerg
 
-   This means a randomly selected race from the three above:
+   The following attribute means a randomly selected race from the three above:
 
    .. attribute:: Race.Random