If cgitb.enable is ran with a logdir set and a format='text' argument, then a trailing message is printed that includes <p> tags.  This should only happen if the format requested is HTML.

The following tiny script shows the problem:

import cgitb
cgitb.enable(format='text', logdir='/tmp')
1/0

Attaching a small patch which addresses. This is against tip on the default branch.

mcjeff@macbook:~/cpython$ ./python.exe --version
Python 3.3.0a0