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<!DOCTYPE html>
<html lang=en>
<head>
  <meta charset=UTF-8>
  <meta name=viewport content="width=device-width,initial-scale=1">
  <title>Preserving Whitespace</title>
  <style>body{font-family:system-ui,sans-serif;margin:0;padding:1.5rem;background:#f8fafc;color:#334155;line-height:1.7}h1{margin:0 0 1rem;font-size:1.25rem;color:#0f172a}pre{margin:0;padding:.75rem 1rem;background:#fff;border:1px solid #cbd5e1;border-radius:8px;font-family:ui-monospace,monospace;font-size:.875rem;line-height:1.5;max-width:420px;color:#0f172a}.hint{margin-top:1rem;font-size:.8125rem;color:#64748b;max-width:420px}</style>
</head>
<body>
  <h1>Whitespace preserved</h1>
  <pre>This      text
  will      be
  displayed exactly
  as       written.</pre>
  <p class=hint>Compare with a normal paragraph — pre keeps every space and line break.</p>
</body>
</html>

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HTML pre Tag — Preserving Whitespace