SF bug #872461: list.extend() described as experimental
diff --git a/Doc/lib/libstdtypes.tex b/Doc/lib/libstdtypes.tex
index 925aac0..7c5cba0 100644
--- a/Doc/lib/libstdtypes.tex
+++ b/Doc/lib/libstdtypes.tex
@@ -1013,9 +1013,7 @@
no longer works in Python 2.0. Use of this misfeature has been
deprecated since Python 1.4.
-\item[(3)] Raises an exception when \var{x} is not a list object. The
- \method{extend()} method is experimental and not supported by
- mutable sequence types other than lists.
+\item[(3)] Raises an exception when \var{x} is not a list object.
\item[(4)] Raises \exception{ValueError} when \var{x} is not found in
\var{s}. When a negative index is passed as the second or third parameter