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-rw-r--r--test/scanf/test_scanf.rb1
-rw-r--r--test/scanf/test_scanfblocks.rb1
-rw-r--r--test/scanf/test_scanfio.rb1
3 files changed, 3 insertions, 0 deletions
diff --git a/test/scanf/test_scanf.rb b/test/scanf/test_scanf.rb
index 93bb63b6aa..827eb2fc3b 100644
--- a/test/scanf/test_scanf.rb
+++ b/test/scanf/test_scanf.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# $Id$
#
# scanf for Ruby
diff --git a/test/scanf/test_scanfblocks.rb b/test/scanf/test_scanfblocks.rb
index aea5033a54..1c2265a825 100644
--- a/test/scanf/test_scanfblocks.rb
+++ b/test/scanf/test_scanfblocks.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# $Id$
#
# scanf for Ruby
diff --git a/test/scanf/test_scanfio.rb b/test/scanf/test_scanfio.rb
index 969a8ad773..cec8750aef 100644
--- a/test/scanf/test_scanfio.rb
+++ b/test/scanf/test_scanfio.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
# $Id$
#
# scanf for Ruby