From ff9d2c7f7a9653006473ff3ca96b4121988104bc Mon Sep 17 00:00:00 2001
From: Andy Zhao <andyzhao.zhao@gmail.com>
Date: Tue, 11 Sep 2018 13:29:28 -0400
Subject: [PATCH] Update gist tag regex (#628)

---
 app/liquid_tags/gist_tag.rb | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/app/liquid_tags/gist_tag.rb b/app/liquid_tags/gist_tag.rb
index 159661ac5..1b38c4792 100644
--- a/app/liquid_tags/gist_tag.rb
+++ b/app/liquid_tags/gist_tag.rb
@@ -38,7 +38,7 @@ class GistTag < LiquidTagBase
   end
 
   def valid_link?(link)
-    (link =~ /^https\:\/\/gist\.github\.com\/([a-zA-Z0-9\-]){1,39}\/([a-zA-Z0-9]){32}\s$/)&.
+    (link =~ /\Ahttps\:\/\/gist\.github\.com\/([a-zA-Z0-9\-]){1,39}\/([a-zA-Z0-9]){32}\s\Z/)&.
       zero?
   end
 end