Mention use of pdb.py to run a script (AMK).

Doc/lib/libpdb.tex

@@ -41,6 +41,10 @@ NameError: 'spam'
 (Pdb) 
 \end{verbatim}
 
+\code{pdb.py} can also be invoked as
+a script to debug other scripts.  For example:
+\code{python /usr/local/lib/python1.4/pdb.py myscript.py}
+
 Typical usage to inspect a crashed program is:
 
 \begin{verbatim}

Doc/libpdb.tex

@@ -41,6 +41,10 @@ NameError: 'spam'
 (Pdb) 
 \end{verbatim}
 
+\code{pdb.py} can also be invoked as
+a script to debug other scripts.  For example:
+\code{python /usr/local/lib/python1.4/pdb.py myscript.py}
+
 Typical usage to inspect a crashed program is:
 
 \begin{verbatim}