Typo in comment.

Author: darius

search.py

@@ -464,8 +464,8 @@ def __call__(self, percept):
         return self.a
 
     def update_state(self, percept):
-        ''' To be overriden in most cases. The default case
-        assumes th percept to be of type state'''
+        '''To be overriden in most cases. The default case
+        assumes the percept to be of type state.'''
         return percept
 
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