I was working through the README here to try out swift-doc, and noticed that it's referenced two different ways - not entirely sure which was correct or if they're explicitly the same. One is swift-doc cmd... and the other is swift doc cmd... (without the hyphen between swift and doc).

I didn't know if you'd done something to extend the "swift" toolchain such that this command would fit in naturally, or if someone was simply knocking out a README quickly and typo'd missing the hyphens in the command. In either case, the equivalency would be usefult to call out if it exists - and the README references made more consistent.

I'm happy to create a pull request to clean things up, but I wanted to ask first what "was the intended way" before I made any of my own assumptions.