tests/histedit-helpers.sh

manifest: move addlistdelta to module-level

Again, there's no reason for this to be inside manifest.add, so we'll
define it only once.

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"
}