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/liburllib.tex b/Doc/lib/liburllib.tex
index 01fc875..1732d85 100644
--- a/Doc/lib/liburllib.tex
+++ b/Doc/lib/liburllib.tex
@@ -55,7 +55,7 @@
 \function{urlretrieve()}.
 \end{funcdesc}
 
-\begin{funcdesc}{quote}{string\optional{\, addsafe}}
+\begin{funcdesc}{quote}{string\optional{, addsafe}}
 Replace special characters in \var{string} using the \samp{\%xx} escape.
 Letters, digits, and the characters \character{_,.-} are never quoted.
 The optional \var{addsafe} parameter specifies additional characters
@@ -64,7 +64,7 @@
 Example: \code{quote('/\~connolly/')} yields \code{'/\%7econnolly/'}.
 \end{funcdesc}
 
-\begin{funcdesc}{quote_plus}{string\optional{\, addsafe}}
+\begin{funcdesc}{quote_plus}{string\optional{, addsafe}}
 Like \function{quote()}, but also replaces spaces by plus signs, as
 required for quoting HTML form values.
 \end{funcdesc}