rust-lang/rust — pull request #19215 by aochagavia (2014-11-22 16:31:21+00:00)
Title: Fix pretty printing unsafe match arms

Closes https://github.com/rust-lang/rust/issues/19077

I would appreciate any guidance on how to write a test for this. I saw some examples in `test/pretty`, but there are different ways to test... With or without `.pp` files, with a `pp-exact` comment, etc.