From af36139218ad607e1f9347876d636bed60b6e767 Mon Sep 17 00:00:00 2001
From: "Tim D. Smith" <git@tim-smith.us>
Date: Wed, 16 Mar 2016 22:51:39 -0700
Subject: [PATCH] Document that Xcode.prefix can be nil

---
 Library/Homebrew/os/mac/xcode.rb | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Library/Homebrew/os/mac/xcode.rb b/Library/Homebrew/os/mac/xcode.rb
index b951b1232a..d0eb50da01 100644
--- a/Library/Homebrew/os/mac/xcode.rb
+++ b/Library/Homebrew/os/mac/xcode.rb
@@ -34,6 +34,8 @@ module OS
         installed? && version >= "4.3" && !MacOS::CLT.installed?
       end
 
+      # Returns a Pathname object corresponding to Xcode.app's Developer
+      # directory or nil if Xcode.app is not installed
       def prefix
         @prefix ||=
           begin