Removed spaces before commas and periods.
diff --git a/Doc/howto/pyporting.rst b/Doc/howto/pyporting.rst
index 9015372..92207e2 100644
--- a/Doc/howto/pyporting.rst
+++ b/Doc/howto/pyporting.rst
@@ -640,7 +640,7 @@
To get a complete idea of what issues you will need to deal with, see the
`What's New in Python 3.0`_. Others have reorganized the data in other formats
-such as http://docs.pythonsprints.com/python3_porting/py-porting.html .
+such as http://docs.pythonsprints.com/python3_porting/py-porting.html\ .
The following are some steps to take to try to support both Python 2 & 3 from
the same source code.