fixed some spelling

docs/idareplayobserver.rst

@@ -9,7 +9,7 @@ IDAReplayObserver
 
    .. method:: IDAReplayObserver.on_game_start(self)
 
-      This method is called when a replay has stared, when you inherit it you have to
+      This method is called when a replay has started, when you inherit it you have to
       call the parent's on_game_start method in order to make it work (see
       :ref:`replays`).
 

docs/replays.rst

@@ -68,7 +68,7 @@ if the information you want could be collected with SC2Reader.
 
 ReplayObserver
 --------------
-This is the second technique it is much like using a bot but whit the difference
+This is the second technique it is much like using a bot but with the difference
 that no action can be preform just observations.