Comment 1 for bug 1165962

The following commit is the cause.

commit 714ade07ac4d1ac0cdf545f5b0823e88af0c03ae
Author: Chris Krelle <email address hidden>
Date: Fri Mar 22 12:59:06 2013 -0700

    Update tools/pip-requires for prettytable

    changes pip-requires from:
        prettytable>=0.6,<0.7
    to:
        prettytable>=0.6,<0.8

    Change-Id: Ia4e7460525e73474c90cd0c50d3d1243f64f68eb
    Authored-by: Chris Krelle <email address hidden>