ign just before the
<code>\end{document}</code>.


</blockquote><p><b>Q.</b> How do I get an output file (root chunk) with an underscore in its name?
   LaTeX complains about the underscore.

<p><blockquote><b>A.</b> All chunk names are set in ordinary TeX mode.  This means that
   underscore is a subscript character.  Rather than use special
   hacks, I just avoid underscores in file names, since I prefer to
   use hyphens anyway.  However, you can write a simple sed script to
   filter the underscores for