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-rw-r--r--guides/rails_guides/markdown.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/guides/rails_guides/markdown.rb b/guides/rails_guides/markdown.rb
index 02d58601c4..cad66b5d6d 100644
--- a/guides/rails_guides/markdown.rb
+++ b/guides/rails_guides/markdown.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
require "redcarpet"
require "nokogiri"
require "rails_guides/markdown/renderer"