tests/histedit-helpers.sh

revert: add a message to noop action

This prepares for the arrival of a second "not touching file" action:
revert of an untracked file.

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"
}