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-rw-r--r--test/workbook/worksheet/tc_page_margins.rb2
1 files changed, 2 insertions, 0 deletions
diff --git a/test/workbook/worksheet/tc_page_margins.rb b/test/workbook/worksheet/tc_page_margins.rb
index 820c65be..8c580204 100644
--- a/test/workbook/worksheet/tc_page_margins.rb
+++ b/test/workbook/worksheet/tc_page_margins.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
require 'tc_helper'
class TestPageMargins < Test::Unit::TestCase