IMO the formatting of the error string returned by errors.Join is atrociously opinionated and not very logging-friendly - it adds a newline between each error message. I know I'm not the only one that has this opinion
You could write your own errorsJoin() and change Error() method to suit your needs.
But really in this particular scenario you would be better served by something like:
func errorsConcat(err1 error, err2 error) error {
if (err1) {
return err1;
}
return err2;
}
In the scenario described in this article, errors.Join() would most often reduce to that (in terms of what Error() string would produce).