Disambiguate List Item Followed by Code Block

[David E. Wheeler]

Howdy,

Quick question: Since list items with multiple paragraphs need to be  
indented four spaces, and code blocks are also indented four spaces,  
is there any way to disambiguate a list followed by a code block?  
Example:

*   This is a list
     item.
*   And so is this.

     Is this a second paragraph in the second list item,
     or a code block?

It looks like Markdown.pl and discount agree that it should be a  
second paragraph. If that is indeed the standard, what should I do if  
I actually want to follow a list with a code block?

Many thanks,

David