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/libimgfile.tex b/Doc/libimgfile.tex
index 098d59b..8ec31e3 100644
--- a/Doc/libimgfile.tex
+++ b/Doc/libimgfile.tex
@@ -30,7 +30,7 @@
 for instance.
 \end{funcdesc}
 
-\begin{funcdesc}{readscaled}{file\, x\, y\, filter\optional{\, blur}}
+\begin{funcdesc}{readscaled}{file, x, y, filter\optional{, blur}}
 This function is identical to read but it returns an image that is
 scaled to the given \var{x} and \var{y} sizes. If the \var{filter} and
 \var{blur} parameters are omitted scaling is done by
@@ -55,7 +55,7 @@
 compatible with X).  The default is zero.
 \end{funcdesc}
 
-\begin{funcdesc}{write}{file\, data\, x\, y\, z}
+\begin{funcdesc}{write}{file, data, x, y, z}
 This function writes the RGB or greyscale data in \var{data} to image
 file \var{file}. \var{x} and \var{y} give the size of the image,
 \var{z} is 1 for 1 byte greyscale images or 3 for RGB images (which are