intra-base-white-space-001-ref.html

<!DOCTYPE html>

  <meta charset="UTF-8">

  <title>CSS Reference File</title>

  <link rel="author" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/">

  <style>
  ruby
    {
      background-color: lightblue;
      font-size: 60px;
    }
  </style>

  <ruby>

    <rb>b</rb><rt>a</rt><rb>&nbsp;</rb><rt></rt><rb>c</rb><rt>a</rt><rb>d&nbsp;</rb><rt>a</rt><rb>e</rb><rt>a</rt>

  </ruby>

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chromium/third_party/blink/web_tests/external/wpt/css/css-ruby/reference/intra-base-white-space-001-ref.html