Allow the changegroup generator to completely load the buffer. This makes is possible to delete or truncate away revisions and still use the changegroup later.

#!/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