fix typo in docs

IPython/zmq/kernelmanager.py

@@ -233,7 +233,7 b' class ShellSocketChannel(ZMQSocketChannel):'
             will force store_history to be False.
 
         store_history : bool, optional (default True)
-            If set, the kernel will execute store command history.  This is forced
+            If set, the kernel will store command history.  This is forced
             to be False if silent is True.
 
         user_variables : list, optional