Option to strip leading whitespace?

I am really loving this directive because it can greatly help me clean up my HTML for some documentation that I am writing! However, it makes me write funny HTML and I was hoping there was a way to get around this.

Since markdown supports code blocks by indenting with 4 spaces, I cannot easily achieve the following because of the leading whitespace:

```

I instead have to write my HTML like the following which is a tad bit ugly:

```

Is there an option to strip the leading whitespace (perhaps based on the first line's amount of whitespace) so that we can more easily use this inline in our HTML?