diff -r e910ea39253f Doc/extending/extending.rst
--- a/Doc/extending/extending.rst	Sun Oct 11 23:03:47 2015 -0700
+++ b/Doc/extending/extending.rst	Mon Oct 12 16:05:53 2015 +0800
@@ -123,11 +123,12 @@
 (usually a *NULL* pointer).  Exceptions are stored in a static global variable
 inside the interpreter; if this variable is *NULL* no exception has occurred.  A
 second global variable stores the "associated value" of the exception (the
-second argument to :keyword:`raise`).  A third variable contains the stack
-traceback in case the error originated in Python code.  These three variables
-are the C equivalents of the result in Python of :meth:`sys.exc_info` (see the
-section on module :mod:`sys` in the Python Library Reference).  It is important
-to know about them to understand how errors are passed around.
+argument passed to the exception object in :keyword:`raise`).  A third variable
+contains the stack traceback in case the error originated in Python code.
+These three variables are the C equivalents of the result in Python of
+:meth:`sys.exc_info` (see the section on module :mod:`sys` in the Python Library
+Reference).  It is important to know about them to understand how errors are
+passed around.
 
 The Python API defines a number of functions to set various types of exceptions.