Remove duplication of "this".
diff --git a/Doc/reference/introduction.rst b/Doc/reference/introduction.rst
index 0d53719..5481043 100644
--- a/Doc/reference/introduction.rst
+++ b/Doc/reference/introduction.rst
@@ -57,7 +57,7 @@
 
 Python for .NET
    This implementation actually uses the CPython implementation, but is a managed
-   .NET application and makes .NET libraries available.  This was created by Brian
+   .NET application and makes .NET libraries available.  It was created by Brian
    Lloyd.  For more information, see the `Python for .NET home page
    <http://www.zope.org/Members/Brian/PythonNet>`_.