Auto merge of rust-lang#780 - rillian:llvm4, r=emilio

bors-servo · web-flow · commit 691834d2265e · 2017-06-29T13:39:38.000-07:00
Drop llvm@3.9 versioning for homebrew.

Homebrew now defaults to llvm 4.0.x so there's no need to specify a specific version to get compatibility, unless we specifically want people using 3.9.
diff --git a/book/src/requirements.md b/book/src/requirements.md
@@ -28,7 +28,7 @@ Download and install the official pre-built binary from
 If you use Homebrew:
 
 ```bash
-$ brew install llvm@3.9
+$ brew install llvm
 ```
 
 If you use MacPorts:
