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-rw-r--r--actionmailer/lib/action_mailer/gem_version.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/actionmailer/lib/action_mailer/gem_version.rb b/actionmailer/lib/action_mailer/gem_version.rb
index f5594ef928..c9bf5b3f75 100644
--- a/actionmailer/lib/action_mailer/gem_version.rb
+++ b/actionmailer/lib/action_mailer/gem_version.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: true
module ActionMailer
# Returns the version of the currently loaded Action Mailer as a <tt>Gem::Version</tt>.
def self.gem_version