From ce33f593b4259d5710cdf36da808be884ddedeef Mon Sep 17 00:00:00 2001
From: Josh Hagins <jhagins@palantir.com>
Date: Sun, 9 Oct 2016 19:44:24 -0400
Subject: [PATCH] metafiles: convert EXTENSIONS and BASENAMES from Array to Set

---
 Library/Homebrew/metafiles.rb | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/Library/Homebrew/metafiles.rb b/Library/Homebrew/metafiles.rb
index bef48f3cf6..d2d9e18770 100644
--- a/Library/Homebrew/metafiles.rb
+++ b/Library/Homebrew/metafiles.rb
@@ -1,13 +1,15 @@
+require "set"
+
 class Metafiles
   # https://github.com/github/markup#markups
   EXTENSIONS = %w[
     .adoc .asc .asciidoc .creole .html .markdown .md .mdown .mediawiki .mkdn
     .org .pod .rdoc .rst .rtf .textile .txt .wiki
-  ].freeze
+  ].to_set.freeze
   BASENAMES = %w[
     about authors changelog changes copying copyright history license licence
     news notes notice readme todo
-  ].freeze
+  ].to_set.freeze
 
   def self.list?(file)
     return false if %w[.DS_Store INSTALL_RECEIPT.json].include?(file)
-- 
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