Incorrect behaviour (Markdown 1.0b4)

[Craig Morgan]

John et al,

I accidentally forgot to quote an inlined code segment yesterday during 
Markdown use and observed that Markdown is recognising underscored 
delimiters even without whitespace.

A bug I think ...

---- Example input ----

... recovery procedure is detailed in the command_reference_guide.pdf, 
App. B

---- Example output ----

<p>&#8230; recovery procedure is detailed in the 
command<em>reference</em>guide.pdf, App. B</p>

-- 
Craig

Craig Morgan