tests/histedit-helpers.sh

obsutil: move the 'marker' class to the new modules

We have a new 'obsutil' module now. We move high level utility there to bring
'obsolete.py' back to a more reasonable size.

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
}