Adds an incorrect trailing slash to file: base URL

[andersk]

>>> urlstd.parse.URL("", "file:///path/page.html").href
'file:///path/page.html/'

The expected result is 'file:///path/page.html' without an extra trailing slash. This also seems to manifest as two failing tests in the test suite:

_________________________________________________________ test_url[expected527] __________________________________________________________
tests/wpt/test_url_constructor.py:28: in test_url
    assert url.href == expected["href"], msg
E   AssertionError: Parsing: <> against <file:///test?test#test>
E   assert 'file:///test/?test' == 'file:///test?test'
E     - file:///test?test
E     + file:///test/?test
E     ?             +
_________________________________________________________ test_url[expected528] __________________________________________________________
tests/wpt/test_url_constructor.py:28: in test_url
    assert url.href == expected["href"], msg
E   AssertionError: Parsing: <file:> against <file:///test?test#test>
E   assert 'file:///test/?test' == 'file:///test?test'
E     - file:///test?test
E     + file:///test/?test
E     ?             +

So I assume you’re aware of this, but maybe you haven’t noticed because of continue-on-error: true in the GitHub Actions workflow?