Fix simple typo: visite -> visit

Closes binux#941

pyspider/libs/counter.py

@@ -330,7 +330,7 @@ class CounterManager(DictMixin):
     """
     A dict like counter manager.
 
-    When using a tuple as event key, say: ('foo', 'bar'), You can visite counter
+    When using a tuple as event key, say: ('foo', 'bar'), You can visit counter
     with manager['foo']['bar'].  Or get all counters which first element is 'foo'
     by manager['foo'].
 

pyspider/libs/utils.py

@@ -344,7 +344,7 @@ def __get__(self, instance, owner):
 
 class ObjectDict(dict):
     """
-    Object like dict, every dict[key] can visite by dict.key
+    Object like dict, every dict[key] can visit by dict.key
 
     If dict[key] is `Get`, calculate it's value.
     """