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-rw-r--r--actionpack/lib/action_controller/caching.rb4
1 files changed, 3 insertions, 1 deletions
diff --git a/actionpack/lib/action_controller/caching.rb b/actionpack/lib/action_controller/caching.rb
index a9a8508abc..97775d1dc8 100644
--- a/actionpack/lib/action_controller/caching.rb
+++ b/actionpack/lib/action_controller/caching.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
module ActionController
# \Caching is a cheap way of speeding up slow applications by keeping the result of
# calculations, renderings, and database calls around for subsequent requests.
@@ -38,7 +40,7 @@ module ActionController
end
def instrument_name
- "action_controller"
+ "action_controller".freeze
end
end
end