Fix Leaked file descriptor in test/did_you_mean
https://github.com/ruby/ruby/commit/de74d2c3b0005048a2c4433bde68b9be10c86f01/checks?check_suite_id=336910877#step:19:131
Leaked file descriptor: NameErrorExtensionTest#test_correctable_error_objects_are_dumpable: 7 : #<File:test_name_error_extension.rb>
Fix Leaked file descriptor in test/did_you_mean
https://github.com/ruby/ruby/commit/de74d2c3b0005048a2c4433bde68b9be10c86f01/checks?check_suite_id=336910877#step:19:131