Parse ISO8601 date/times without punctuation

[brianguertin]

It looks like parsing only works if the string contains - and : characters, but these are actually optional in ISO8601.

For example, this local date/time should parse fine, but doesn't:
LocalDateTime.parse("20221025T0600")

[dkhalanskyjb]

Kind of. You can't say, for example, 2022-10-25T0600. There are two separate kinds of ISO-8601 formats: the basic one (the one you're requesting) and the extended one (the one we support). You're right though that we should document in our parse functions that they only support the extended format.