[Bug #914375] Crude modulefinder docs, but the module's code is very hard to read...

diff --git a/Doc/lib/libmodulefinder.tex b/Doc/lib/libmodulefinder.tex
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+\section{\module{modulefinder} ---
+         Find modules used by a script}
+\sectionauthor{A.M. Kuchling}{amk@amk.ca}
+
+\declaremodule{standard}{modulefinder}
+\modulesynopsis{Find modules used by a script.}
+
+This module provides a \class{ModuleFinder} class that can be used to
+determine the set of modules imported by a script.
+\code{modulefinder.py} can also be run as a script, giving the
+filename of a Python script as its argument, after which a report of
+the imported modules will be printed.
+
+\begin{funcdesc}{AddPackagePath}{pkg_name, path}
+Record that the package named \var{pkg_name} can be found in the specified \var{path}.
+\end{funcdesc}
+
+\begin{funcdesc}{ReplacePackage}{oldname, newname}
+Allows specifying that the module named \var{oldname} is in fact
+the package named \var{newname}.  The most common usage would be 
+to handle how the \module{_xmlplus} package replaces the \module{xml}
+package.
+\end{funcdesc}
+
+\begin{classdesc}{ModuleFinder}{\optional{path=None, debug=0, excludes=[], replace_paths=[]}}
+
+This class provides \method{run_script()} and \method{report()}
+methods to determine the set of modules imported by a script.
+\var{path} can be a list of directories to search for modules; if not
+specified, \code{sys.path} is used. 
+\var{debug} sets the debugging level; higher values make the class print 
+debugging messages about what it's doing.
+\var{excludes} is a list of module names to exclude from the analysis.
+\var{replace_paths} is a list of \code{(\var{oldpath}, \var{newpath})}
+tuples that will be replaced in module paths.
+\end{classdesc}
+
+\begin{methoddesc}[ModuleFinder]{report}{}
+Print a report to standard output that lists the modules imported by the script
+and their
+paths, as well as modules that are missing or seem to be missing.
+\end{methoddesc}
+
+\begin{methoddesc}[ModuleFinder]{run_script}{pathname}
+Analyze the contents of the \var{pathname} file, which must contain 
+Python code.
+\end{methoddesc}
+ 
+