Logged In: YES 
user_id=195958

This patch is probably mutually exclusive with patch 
#933238 [1], since they both have the same goal: to 
allow blank lines in doctest output. I thought of this 
solution first, but I think I prefer the other patch. 
Here's a comparison of pros and cons of this patch vs 
#933238.

[-] it needs a special option to turn it on
[-] it doesn't handles trailing blank lines
[-] it will break external tools like epytext and 
restructuredtext that look for doctest blocks.
[+] the user doesn't have to manually add blank line 
markers.