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chromium/third_party/blink/web_tests/fast/multicol/columns-shorthand-parsing.html 

<!DOCTYPE html>
<style>
div {
    -webkit-columns: 2;
    -webkit-column-gap: 0;
    line-height: 20px;
    height: 200px;
}
</style>
<div>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
This content should be split into two columns.<br>
</div>