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-rw-r--r--lib/rdoc/encoding.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/rdoc/encoding.rb b/lib/rdoc/encoding.rb
index b3515a435f..5327f9a961 100644
--- a/lib/rdoc/encoding.rb
+++ b/lib/rdoc/encoding.rb
@@ -1,4 +1,5 @@
# coding: US-ASCII
+# frozen_string_literal: false
##
# This class is a wrapper around File IO and Encoding that helps RDoc load