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chromium/third_party/blink/web_tests/virtual/text-antialias/break-word-fit-content-arabic.html 

<!DOCTYPE html>
<meta charset="utf-8">
<style>
div {
  font-size: 600%;
  display: inline-block;
  word-wrap: break-word;
}
</style>
<div>ثثبو</div>