From 07d904fdb56fc8ebfca743dbf9219348f95551c6 Mon Sep 17 00:00:00 2001
From: Mike McQuaid <mike@mikemcquaid.com>
Date: Sun, 10 Jul 2016 13:53:03 +0100
Subject: [PATCH] requirement: more obvious error message.

Make it more obvious which class was unsatisfied to produce this error
message.
---
 Library/Homebrew/requirement.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Library/Homebrew/requirement.rb b/Library/Homebrew/requirement.rb
index fd726be204..7a40d419e6 100644
--- a/Library/Homebrew/requirement.rb
+++ b/Library/Homebrew/requirement.rb
@@ -31,7 +31,8 @@ class Requirement
 
   # The message to show when the requirement is not met.
   def message
-    s = ""
+    _, _, class_name = self.class.to_s.rpartition "::"
+    s = "#{class_name} unsatisfied!\n"
     if cask
       s += <<-EOS.undent