lib/rspec/support/mutex.rb in rspec-support-3.12.1 vs lib/rspec/support/mutex.rb in rspec-support-3.12.2

@@ -1,4 +1,6 @@
+# frozen_string_literal: true
+
 module RSpec
   module Support
     # On 1.8.7, it's in the stdlib.
     # We don't want to load the stdlib, b/c this is a test tool, and can affect
     # the test environment, causing tests to pass where they should fail.