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-rw-r--r--ext/digest/sha2/lib/sha2.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/digest/sha2/lib/sha2.rb b/ext/digest/sha2/lib/sha2.rb
index 58d12e9b09..58ff9f5cf0 100644
--- a/ext/digest/sha2/lib/sha2.rb
+++ b/ext/digest/sha2/lib/sha2.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
#--
# sha2.rb - defines Digest::SHA2 class which wraps up the SHA256,
# SHA384, and SHA512 classes.