\documentstyle[11pt,noweb]{article}
\noweboptions{longchunks,noidentxref,smallcode}
\pagestyle{noweb}

\def\noweb/{{\tt noweb}}

\title{A Hack for Typesetting Strings in \noweb/\thanks{This
code is hereby placed in the public domain.}}
\author{Lee Wittenberg\\Kean College of New Jersey\\Union, NJ
07083\\\tt leew@pilot.njin.net}

\begin{document}
\maketitle

The following macros adjust things so that \noweb/ will use 
``visible spaces'' in double-quoted strings within code chunks. 
The same effect can be 
achieved for single-quoted strings by replacing each occurrence 
of `[["]]', below, with `[[']]'.
It doesn't work within \verb"[["~\ldots~\verb"]]" (although I 
can't figure out why).
<<*>>=
\global\let\xsetup=\setupcode
\bgroup
	\catcode`\"=\active\gdef\setupcode{\xsetup
	\catcode`\"=\active\def"##1"{\char`\"\xxx{##1}\char`\"}}%
\egroup
\bgroup
	\catcode`\ =\active\gdef\xxx#1{{\catcode`\ =\active\chardef ='40#1}}%
\egroup
@
\end{document}