restructured library manual accordiung to functional group
diff --git a/Doc/lib/libobjs.tex b/Doc/lib/libobjs.tex
index 49a86fc..9006b8a 100644
--- a/Doc/lib/libobjs.tex
+++ b/Doc/lib/libobjs.tex
@@ -4,16 +4,21 @@
Names for built-in exceptions and functions are found in a separate
symbol table. This table is searched last, so local and global
-user-defined names can override built-in names. Built-in types have
-no names but are created easily by constructing an object of the
-desired type (e.g., using a literal) and applying the built-in
-function \code{type()} to it. They are described together here for
-easy reference.%
-\footnote{Some descriptions sorely lack explanations of the exceptions
+user-defined names can override built-in names. Built-in types are
+described together here for easy reference. %
+\footnote{Most descriptions sorely lack explanations of the exceptions
that may be raised --- this will be fixed in a future version of
- this document.}
+ this manual.}
\indexii{built-in}{types}
\indexii{built-in}{exceptions}
\indexii{built-in}{functions}
\index{symbol table}
\bifuncindex{type}
+
+The tables in this chapter document the priorities of operators by
+listing them in order of ascending priority (within a table) and
+grouping operators that have the same priority in the same box.
+Binary operators of the same priority group from left to right.
+(Unary operators group from right to left, but there you have no real
+choice.) See Chapter 5 of the Python Reference Manual for the
+complete picture on operator priorities.