Plugin overrides own classes for pre #7
Description
It appears to me that the plugin overrides other classes of the pre tag when generating.
Especially when using the bootstrap class .pre-scrollable it is a little annoying that all original classes are stripped off the <pre> tag.
Im not sure if this also applies to classes of the original <code> tag.
Example:
<pre class="pre-scrollable">
<code class="lang-json">
{
"foo": 1
}
</code>
</pre>Should generate into:
<pre class="pre-scrollable highlight">
<code class="json">
{
"<span class="attribute">foo</span>": <span class="value"><span class="number">1</span></span>
}
</code>
</pre>But instead generates into:
<pre class="highlight">
<code class="json">
{
"<span class="attribute">foo</span>": <span class="value"><span class="number">1</span></span>
}
</code>
</pre>If this is the intended behavior i apologize for bothering you, but if not it may be important for more people than me.