./mach test-tidy should also check .html files, to avoid patches containing badly formatted new test cases go unnoticed --- - [X] `./mach build -d` does not report any errors - [X] `./mach test-tidy` does not report any errors - [X] These changes fix #12421 - [X] There are tests for these changes (./mach test-tidy failed without the changes to .hrml files) Source-Repo: https://github.com/servo/servo Source-Revision: 93004ce57999947f51067d680c6fde056741331a