tests/histedit-helpers.sh

setup: add hgext.lfs to list of Python packages

This is needed for lfs to get installed. Probably could stand to go
into an earlier patch, but I just want to get this stuff pushed.

fixbundle() {
    grep -v 'saving bundle' | grep -v 'saved backup' | \
        grep -v added | grep -v adding | \
        grep -v "unable to find 'e' for patching" | \
        grep -v "e: No such file or directory" | \
    cat
}