Fix "NotImplentedError" typo in constants documentation (#692)

`NotImplentedError` --> `NotImplementedError`

diff --git a/Doc/library/constants.rst b/Doc/library/constants.rst
index f0742cee55bd55291842e52c9d1aaed695f12313..469a3eed606ff079eb9a81b2d0b66c5cce037ed4 100644 (file)
--- a/Doc/library/constants.rst
+++ b/Doc/library/constants.rst
@@ -46,7 +46,7 @@ A small number of constants live in the built-in namespace.  They are:
 
    .. note::
 
-      ``NotImplentedError`` and ``NotImplemented`` are not interchangeable,
+      ``NotImplementedError`` and ``NotImplemented`` are not interchangeable,
       even though they have similar names and purposes.
       See :exc:`NotImplementedError` for details on when to use it.