Work around the conversion of ">>" and "<<" to guillemets. Reported by Ping.

Doc/inst/inst.tex

@@ -364,7 +364,7 @@ running Python in interactive mode and typing a few simple commands.
 Under \UNIX, just type \code{python} at the shell prompt; under Windows,
 run ``Python 2.0 (interpreter)'' \XXX{right?}; under MacOS, \XXX{???}.
 Once the interpreter is started, you type Python code at the
-\samp{>>> } prompt.  For example, on my Linux system, I type the three
+\samp{>\code{>}> } prompt.  For example, on my Linux system, I type the three
 Python statements shown below, and get the output as shown, to find
 out my \filevar{prefix} and \filevar{exec-prefix}:
 

Doc/lib/libdis.tex

@@ -56,7 +56,7 @@ was provided.  The output is divided in the following columns:
 
 \begin{enumerate}
 \item the current instruction, indicated as \samp{-->},
-\item a labelled instruction, indicated with \samp{>>},
+\item a labelled instruction, indicated with \samp{>\code{>}},
 \item the address of the instruction,
 \item the operation code name,
 \item operation parameters, and