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-rw-r--r--test/win32ole/test_err_in_callback.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/test/win32ole/test_err_in_callback.rb b/test/win32ole/test_err_in_callback.rb
index cae6d493cb..2c2b4a61a1 100644
--- a/test/win32ole/test_err_in_callback.rb
+++ b/test/win32ole/test_err_in_callback.rb
@@ -1,3 +1,4 @@
+# frozen_string_literal: false
#
# test Win32OLE avoids cfp consistency error when the exception raised
# in WIN32OLE_EVENT handler block. [ruby-dev:35450]