Replace "\begin{classdesc}{SomeClass}{\unspecified}" with

"\begin{classdesc*}{SomeClass}" -- the rendering of \unspecified was
identical to \moreargs, so this helps clarify things just a little.

Doc/lib/libdifflib.tex

@@ -40,7 +40,7 @@
 \end{verbatim}
 \end{funcdesc}
 
-\begin{classdesc}{SequenceMatcher}{\unspecified}
+\begin{classdesc*}{SequenceMatcher}
   This is a flexible class for comparing pairs of sequences of any
   type, so long as the sequence elements are hashable.  The basic
   algorithm predates, and is a little fancier than, an algorithm
@@ -72,6 +72,8 @@
 
 \subsection{SequenceMatcher Objects \label{sequence-matcher}}
 
+The \class{SequenceMatcher} class has this constructor:
+
 \begin{classdesc}{SequenceMatcher}{\optional{isjunk\optional{,
                                    a\optional{, b}}}}
   Optional argument \var{isjunk} must be \code{None} (the default) or

Doc/lib/libzipfile.tex

@@ -25,13 +25,13 @@ The available attributes of this module are:
   The error raised for bad ZIP files.
 \end{excdesc}
 
-\begin{classdesc}{ZipFile}{\unspecified}
+\begin{classdesc*}{ZipFile}
   The class for reading and writing ZIP files.  See
   ``\citetitle{ZipFile Objects}'' (section \ref{zipfile-objects}) for
   constructor details.
 \end{classdesc}
 
-\begin{classdesc}{PyZipFile}{\unspecified}
+\begin{classdesc*}{PyZipFile}
   Class for creating ZIP archives containing Python libraries.
 \end{classdesc}