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-rw-r--r--ext/socket/mkconstants.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/ext/socket/mkconstants.rb b/ext/socket/mkconstants.rb
index 59fcb17..0ebf628 100644
--- a/ext/socket/mkconstants.rb
+++ b/ext/socket/mkconstants.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
require 'optparse'
require 'erb'