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Advanced formatting help

<p
    >Posts on Codidact, including questions, answers, articles, tag wikis, help pages, and user
    profiles, support the use of the following HTML tags:</p
>
<ul>
    <li><code>a</code></li>
    <li><code>p</code></li>
    <li><code>span</code></li>
    <li><code>b</code></li>
    <li><code>i</code></li>
    <li><code>em</code></li>
    <li><code>s</code></li>
    <li><code>strong</code></li>
    <li><code>hr</code></li>
    <li
        ><code>h1</code>, <code>h2</code>, <code>h3</code>, <code>h4</code>, <code>h5</code>,
        <code>h6</code></li
    >
    <li><code>blockquote</code></li>
    <li><code>img</code></li>
    <li><code>strike</code></li>
    <li><code>del</code>, <code>ins</code></li>
    <li><code>code</code></li>
    <li><code>pre</code></li>
    <li><code>br</code></li>
    <li><code>ul</code>, <code>ol</code>, <code>li</code></li>
    <li><code>sup</code>, <code>sub</code></li>
    <li><code>section</code></li>
    <li><code>details</code>, <code>summary</code></li>
    <li
        ><code>table</code>, <code>thead</code>, <code>tbody</code>, <code>tr</code>,
        <code>th</code>, <code>td</code></li
    >
</ul>
<p>These tags may have the following attributes:</p>
<ul>
    <li><code>id</code></li>
    <li><code>class</code></li>
    <li><code>href</code></li>
    <li><code>title</code></li>
    <li><code>src</code></li>
    <li><code>height</code></li>
    <li><code>width</code></li>
    <li><code>alt</code></li>
    <li><code>dir</code></li>
    <li><code>lang</code></li>
    <li><code>start</code></li>
    <li><code>rowspan</code></li>
    <li><code>colspan</code></li>
</ul>
<p>Shorter text forms, such as comments, support the following HTML tags:</p>
<ul>
    <li><code>a</code></li>
    <li><code>b</code></li>
    <li><code>i</code></li>
    <li><code>em</code></li>
    <li><code>strong</code></li>
    <li><code>strike</code></li>
    <li><code>del</code></li>
    <li><code>code</code></li>
</ul>
<p>These tags may have the following attributes:</p>
<ul>
    <li><code>href</code></li>
    <li><code>title</code></li>
</ul>
<hr />
<p
    >HTML tags that do not appear on this list will be stripped out and not displayed if they are
    included in posts or comments. The source code for supported tags in posts can be found in
    <a href="https://github.com/codidact/qpixel/blob/develop/app/helpers/posts_helper.rb#L46"
        ><code>posts_helper.rb</code></a
    >, and for comments in
    <a href="https://github.com/codidact/qpixel/blob/develop/app/helpers/comments_helper.rb#L81"
        ><code>comments_helper.rb</code></a
    >.</p
>
<hr />
<p
    ><sub
        >Much of the content of this page came from
        <a href="https://meta.codidact.com/posts/277420/277424#answer-277424"
            >this answer by luap42</a
        >.</sub
    ></p
>