List constraints on xrange() objects.
diff --git a/Doc/lib/libstdtypes.tex b/Doc/lib/libstdtypes.tex
index 4f7e27a..80262b0 100644
--- a/Doc/lib/libstdtypes.tex
+++ b/Doc/lib/libstdtypes.tex
@@ -379,21 +379,27 @@
constructed by the comma operator (not within square brackets), with
or without enclosing parentheses, but an empty tuple must have the
enclosing parentheses, e.g., \code{a, b, c} or \code{()}. A single
-item tuple must have a trailing comma, e.g., \code{(d,)}. Buffers are
-not directly supported by Python syntax, but can be created by calling the
-builtin function \function{buffer()}.\bifuncindex{buffer} XRanges
-objects are similar to buffers in that there is no specific syntax to
-create them, but they are created using the \function{xrange()}
-function.\bifuncindex{xrange}
+item tuple must have a trailing comma, e.g., \code{(d,)}.
\obindex{sequence}
\obindex{string}
\obindex{Unicode}
-\obindex{buffer}
\obindex{tuple}
\obindex{list}
+
+Buffer objects are not directly supported by Python syntax, but can be
+created by calling the builtin function
+\function{buffer()}.\bifuncindex{buffer}. They don't support
+concatenation or repetition.
+\obindex{buffer}
+
+Xrange objects are similar to buffers in that there is no specific
+syntax to create them, but they are created using the \function{xrange()}
+function.\bifuncindex{xrange} They don't support slicing,
+concatenation or repetition, and using \code{in}, \code{not in},
+\function{min()} or \function{max()} on them is inefficient.
\obindex{xrange}
-Sequence types support the following operations. The \samp{in} and
+Most sequence types support the following operations. The \samp{in} and
\samp{not in} operations have the same priorities as the comparison
operations. The \samp{+} and \samp{*} operations have the same
priority as the corresponding numeric operations.\footnote{They must