tests/histedit-helpers.sh

test-revert: removing a missing file has no effect

The tests for removed_deleted and removed_removed test the same state
as removed_clean and removed_untracked-clean, respectively. Drop the
duplicate tests.

See additional motivation in earlier patch.

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"
}