Prefix length minimum confounded me for hours

[andreweades]

I found that Prefix(where:) defaulting to a zero minimum length unintuitive.

I needed to use this form as the final catch-all in a OneOf to get anything that was not parsed as a specific token:

Prefix(1...) { !$0.isWhitespace }

I can't see how a minimum length of zero is useful though as it ends up in an infinite loop as zero length sequence matches all the time but never the input.