The modifications are listed here:
https://lists.swift.org/pipermail/swift-evolution/Week-of-Mon-20160307/012329.html

Comment by Luc (JIRA)

I'll try to work on that for my first contribution to Swift.

Fantastic!

Comment by Step Christopher (JIRA)

LFabien (JIRA User) I've started working on this, but I'm still learning my way around the compiler code and toolchains. Happy to coordinate. This is probably a very small job for those familiar with the innards of Swift, lit.py, etc - but it's going to take some figuring out for me. 🙂

I'll share as I have some commits on my branch.

Comment by Luc (JIRA)

Hi step (JIRA User) You started working on it first so I'll try to find another task 🙂 I didn't see your message at first so I've also started working on this (I renamed the different functions and I was fixing a few failing tests).

Let me know if you need help or if you stop working on it and I'll push my changes.

Comment by Step Christopher (JIRA)

Thanks, will do. There are lots of things marked as starter bugs it looks like, and a couple similar syntax changes. I'll definitely let you know if I get stuck though. So far I started by changing some tests to expect the new syntax, and figuring out the test and build infrastructure. Hoping to get a lot done this weekend.

@tkremenek submitted a PR with an implementation of this here:
#2215

Landed in `master`:

b8bbed8