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-rw-r--r--lib/rdoc/stats/normal.rb1
-rw-r--r--lib/rdoc/stats/quiet.rb1
-rw-r--r--lib/rdoc/stats/verbose.rb1
3 files changed, 3 insertions, 0 deletions
diff --git a/lib/rdoc/stats/normal.rb b/lib/rdoc/stats/normal.rb
index ef366a500e..f32db48005 100644
--- a/lib/rdoc/stats/normal.rb
+++ b/lib/rdoc/stats/normal.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
begin
require 'io/console/size'
rescue LoadError
diff --git a/lib/rdoc/stats/quiet.rb b/lib/rdoc/stats/quiet.rb
index eed27b2a88..561c272ef7 100644
--- a/lib/rdoc/stats/quiet.rb
+++ b/lib/rdoc/stats/quiet.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
##
# Stats printer that prints nothing
diff --git a/lib/rdoc/stats/verbose.rb b/lib/rdoc/stats/verbose.rb
index 430809ae07..e04edade52 100644
--- a/lib/rdoc/stats/verbose.rb
+++ b/lib/rdoc/stats/verbose.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
##
# Stats printer that prints everything documented, including the documented
# status