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-rw-r--r--lib/rdoc/generator/pot/message_extractor.rb1
-rw-r--r--lib/rdoc/generator/pot/po.rb1
-rw-r--r--lib/rdoc/generator/pot/po_entry.rb1
3 files changed, 3 insertions, 0 deletions
diff --git a/lib/rdoc/generator/pot/message_extractor.rb b/lib/rdoc/generator/pot/message_extractor.rb
index ceabc5262a..0dd2497c26 100644
--- a/lib/rdoc/generator/pot/message_extractor.rb
+++ b/lib/rdoc/generator/pot/message_extractor.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
##
# Extracts message from RDoc::Store
diff --git a/lib/rdoc/generator/pot/po.rb b/lib/rdoc/generator/pot/po.rb
index 6a6b5821f3..60e14db831 100644
--- a/lib/rdoc/generator/pot/po.rb
+++ b/lib/rdoc/generator/pot/po.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
##
# Generates a PO format text
diff --git a/lib/rdoc/generator/pot/po_entry.rb b/lib/rdoc/generator/pot/po_entry.rb
index d4cef59ee9..515d02b48d 100644
--- a/lib/rdoc/generator/pot/po_entry.rb
+++ b/lib/rdoc/generator/pot/po_entry.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
##
# A PO entry in PO