Wim Jeantine-Glenn

This will definitely be backwards-incompatible: it would change behavior of existing code that checks if a parse result is None. That is not to say that it can't go in,...

Hmm, wouldn't that make the result ambiguous? Considering that these format the same: ``` >>> fs.format(date=datetime.date.today(), name="Joe") 'Date: 20251031 Name: .............Joe' >>> fs.format(date=datetime.date.today(), name="...Joe") 'Date: 20251031 Name: .............Joe' ```

@perlpunk Does that include the merge keys themselves, or only the keys after a resolved merge? e.g. ``` - k0: v0 vars: &splat0 VAR0: potato # vars from blob0 -...

Then what about ``` - k: v extra: VAR0: before

You can see my comment in the [packaging.python.org guide](https://github.com/pypa/packaging.python.org/pull/1276#issuecomment-1646696925) for several more downsides. What happened with python-dateutil 2.9.0 release is a great case-study on the sort of difficulties that the...