Backticks render as block-level not span

[petdance]

See http://daringfireball.net/projects/markdown/syntax#code

I should be able to say things like

The var `$foo` will now contain the string `bar`.

and have that be all one sentence, with two inline spans that are monospaced code. But they are converted to block level code.

[petdance]

My mistake. They're converted to <code> tags, which can be inline or not. Maybe the solution would be to convert to <code class="inline">