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chromium/third_party/blink/web_tests/fast/multicol/span/pseudo-before-after-expected.html 

<!DOCTYPE html>
<p>There should be three rectangles with identical sizes below. The first and third one
    should be yellow with some dots inside. The second one should be blue with nothing
    inside.</p>
<div style="line-height:100px; background:blue;">
    <div style="background:yellow;">..........</div>
    &nbsp;
    <div style="background:yellow;">..........</div>
</div>