Catch illegal boolean values in hgrc nicely. With hg 0.9.3 the section and parameter name wasn't printed, with hg 0.9.4 there was a traceback for ValueError.

#!/bin/sh

hg
hg -q
hg help
hg -q help
hg add -h
hg add --skjdfks
hg help diff
hg help status
hg -q help status
hg help foo
hg skjdfks

exit 0