rMOZILLARELEASEc40bbd433a8f

Bug 1619384 [wpt PR 22047] - Add a test that hspace and vspace attributes on iframe are not mapped…, a=testonly

Automatic update from web-platform-tests
Test that <iframe hspace/vspace> are not mapped to style

For https://github.com/whatwg/html/pull/4743.
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wpt-commits: df5dd5a92d8c014b21b670841ce6787e422865df
wpt-pr: 22047