Swift string comparison doesn't consider ligatures equivalent to their components

[xwu (Xiaodi Wu)]

@wadetregaskis

It'd be nice to see improved Unicode support in Swift's standard library, though - e.g. the ability to compare strings for "compatible" equivalence, to explicitly control normalisation, etc.

For sure, there are areas of improvement to be made here (see String case folding and normalization APIs)—and it would be good to see some movement here. I'm not in a position to champion this at the moment, but if someone wants to run with it...