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chromium/third_party/blink/web_tests/fast/multicol/span/spanner-last-expected.html 

<!DOCTYPE html>
<p>You should see the word 'PASS' twice below (letter spacing will differ):</p>
<div style="-webkit-columns:4; -webkit-column-gap:0; width:4em;">
    P<br>A<br>S<br>S
</div>
<div style="-webkit-column-span:all;">PASS<br>&nbsp;</div>