ed entities like
    &lt;code&gt;&amp;amp;mdash;&lt;/code&gt; instead of decimal-encoded
    entites like &lt;code&gt;&amp;amp;#8212;&lt;/code&gt;.&lt;/p&gt;


To specify an entire block of pre-formatted code, indent every line of
the block by 4 spaces or 1 tab. Just like with code spans, `&amp;`, `&lt;`,
and `&gt;` characters will be escaped automatically.

Markdown:

    If you want your page to validate under XHTML 1.0 Strict,
    you've got to put paragraph tags in your blockquotes:

        &lt;blockqu