Rewrite missing_options in a more obvious way

1 files changed, 2 insertions, 3 deletions

diff --git a/Library/Homebrew/dependency.rb b/Library/Homebrew/dependency.rb
index 1a838aaee..ebfefc4b5 100644
--- a/Library/Homebrew/dependency.rb
+++ b/Library/Homebrew/dependency.rb
@@ -43,9 +43,8 @@ class Dependency
   end
 
   def missing_options(inherited_options)
-    missing = options | inherited_options
-    missing -= Tab.for_formula(to_formula).used_options
-    missing
+    required = options | inherited_options
+    required - Tab.for_formula(to_formula).used_options
   end
 
   def modify_build_environment