Auto merge of #8742 - jmr0:master, r=Ms2ger
Auto merge of #8742 - jmr0:master, r=Ms2ger

adding wpt lint script to tidy checks

Fixes #8285.

Tidy check will fail, however, until we merge the latest https://github.com/w3c/web-platform-tests/blob/master/lint.whitelist

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