Change "\," to just "," in function signatures.  This is easier to maintain,
works better with LaTeX2HTML, and allows some simplification of the python.sty
macros.
diff --git a/Doc/lib/libpickle.tex b/Doc/lib/libpickle.tex
index e2dab0a..d508e5b 100644
--- a/Doc/lib/libpickle.tex
+++ b/Doc/lib/libpickle.tex
@@ -229,7 +229,7 @@
 Apart from the \code{Pickler} and \code{Unpickler} classes, the
 module defines the following functions, and an exception:
 
-\begin{funcdesc}{dump}{object\, file\optional{, bin}}
+\begin{funcdesc}{dump}{object, file\optional{, bin}}
 Write a pickled representation of \var{obect} to the open file object
 \var{file}.  This is equivalent to
 \code{Pickler(\var{file}, \var{bin}).dump(\var{object})}.