It was added in 2007, never KEYWORDED, does not work with python-2.6.
# Víctor Ostorga <vostorga@gentoo.org> (07 Nov 2009) Added in 2007, never KEYWORDED, does not work with python-2.6. Masked for removal in 30 days, See bug #292289 for reference app-text/doclifter
treecleaned.