Auto merge of #13447 - gterzian:check_webidls_folder_files, r=Wafflespeanut

Have tidy ensure that the there are no extra files in the webidls folder #13427

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 Have tidy ensure that the there are no extra files in the webidls folder #13427

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- [x] `./mach build -d` does not report any errors
- [x] `./mach test-tidy` does not report any errors
- [x] These changes fix #13427 (github issue number if applicable).

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- [x] There are tests for these changes

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1 files changed, 0 insertions, 0 deletions

diff --git a/python/tidy/servo_tidy_tests/dir_check/webidl_plus/test.webidl b/python/tidy/servo_tidy_tests/dir_check/webidl_plus/test.webidl
new file mode 100644
index 00000000000..e69de29bb2d
--- /dev/null
+++ b/python/tidy/servo_tidy_tests/dir_check/webidl_plus/test.webidl