Fix another oldie (item (b) only):

Date:    Fri, 20 Dec 1996 14:47:50 +0100
From:    Lele Gaifax <lele@nautilus.eclipse.it>
To:      Python List <python-list@cwi.nl>
Subject: Typos in ref manual

Hi all,
browsing the reference manual I noticed what seem two small errors:
  a) in the list of keywords (section 2.3.1) 'exec' is missing
  b) in the Operator Precedence table (5.12) the comparison operators
     include '=', but probably '==' was intended.
Hope this help,
lele.

Doc/ref/ref5.tex

@@ -731,7 +731,7 @@ chain from left to right --- see above).
 \hline
 \keyword{in}, \keyword{not} \keyword{in} & Membership tests \\
 \keyword{is}, \keyword{is not} & Identity tests \\
-\code{<}, \code{<=}, \code{>}, \code{>=}, \code{<>}, \code{!=}, \code{=} &
+\code{<}, \code{<=}, \code{>}, \code{>=}, \code{<>}, \code{!=}, \code{==} &
 	Comparisons \\
 \hline
 \code{|} & Bitwise OR \\