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-rw-r--r--test/digest/digest/foo.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/digest/digest/foo.rb b/test/digest/digest/foo.rb
index d576ef00e0..6d42b003fb 100644
--- a/test/digest/digest/foo.rb
+++ b/test/digest/digest/foo.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
module Digest
Foo = nil