examples/chat/server.rb in async-io-1.27.2 vs examples/chat/server.rb in async-io-1.27.3

@@ -1,5 +1,6 @@
 #!/usr/bin/env ruby
+# frozen_string_literal: true
 
 $LOAD_PATH << File.expand_path("../../lib", __dir__)
 
 require 'set'