add missing parenthesis to 'action' argparse doc; thanks to kishkin from docs@
diff --git a/Doc/library/argparse.rst b/Doc/library/argparse.rst
index 83e8479..36f4da2 100644
--- a/Doc/library/argparse.rst
+++ b/Doc/library/argparse.rst
@@ -749,7 +749,7 @@
* ``values`` - The associated command-line arguments, with any type conversions
applied. (Type conversions are specified with the type_ keyword argument to
- :meth:`~ArgumentParser.add_argument`.
+ :meth:`~ArgumentParser.add_argument`.)
* ``option_string`` - The option string that was used to invoke this action.
The ``option_string`` argument is optional, and will be absent if the action