 long lines on purpose, to preserve the desirable
   property that the source and TeX files have identical line numbers.
   This property guarantees that the line numbers in error messages
   from TeX refer to the lines of the source file, so that, for
   example, if TeX complains of an unknown control sequence on line 632,
   you can just refer to line 632 of your noweb file.
<p>
 Most very long lines are caused by long
   code chunks 
   containing lots of identifier definitions, so 
   if you cannot get 