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-rw-r--r--activemodel/lib/active_model.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/activemodel/lib/active_model.rb b/activemodel/lib/active_model.rb
index ba1d2fbd44..dfd9be34a9 100644
--- a/activemodel/lib/active_model.rb
+++ b/activemodel/lib/active_model.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
#--
# Copyright (c) 2004-2017 David Heinemeier Hansson
#