tests/histedit-helpers.sh

tests: filter out PEP 657 error locations in tracebacks (issue6780)

https://docs.python.org/3/whatsnew/3.11.html#whatsnew311-pep657

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
}