plified example,
    the Lua pattern does not consider whitespace between the &lsquo;=&rsquo; nor does it
    consider that using single quotes is valid.) If there is a match, the
    functional pattern returns a value instead of <code>nil</code>. In this case, the value
    returned does not matter because we ultimately want to style the &ldquo;style&rdquo; tag
    as an HTML tag, so the actual start rule looks like this:</p>

    <pre><code>
    local css_start_rule = #css_tag * tag
    </code></pre>

   