From eb0bf16cce4b41c1ada6c031c37414c41deb9ceb Mon Sep 17 00:00:00 2001
From: Paul Chaignon <paul.chaignon@gmail.com>
Date: Tue, 4 Aug 2015 17:28:52 +0200
Subject: [PATCH] Case-insensitive extension match for heuristic rules

---
 lib/linguist/heuristics.rb | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/lib/linguist/heuristics.rb b/lib/linguist/heuristics.rb
index a6346005..fc8699c5 100644
--- a/lib/linguist/heuristics.rb
+++ b/lib/linguist/heuristics.rb
@@ -56,7 +56,7 @@ module Linguist
 
     # Internal: Check if this heuristic matches the candidate languages.
     def matches?(filename)
-      @extensions.any? { |ext| filename.end_with?(ext) }
+      @extensions.any? { |ext| filename.downcase.end_with?(ext) }
     end
 
     # Internal: Perform the heuristic
@@ -351,7 +351,7 @@ module Linguist
       end
     end
 
-    disambiguate ".r", ".R" do |data|
+    disambiguate ".r" do |data|
       if /\bRebol\b/i.match(data)
         Language["Rebol"]
       elsif data.include?("<-")