create code snippet box in html code example
Example: insert code snippet into html
<pre class="line-numbers">
<code class="language-css">
p { color: red }
</code>
</pre>
/* The following language classes are supported:
language-markup – Use for HTML, XML, etc…
language-css
language-clike
language-javascript
language-java
language-php
language-scss
language-bash
language-python
language-sql
language-https
language-csharp
language-aspnet
language-scala
language-haskell
language-objectivec
language-latex
language-git */