Finish SF patch 477059: __del__ on new classes vs. GC.
Just doc and NEWS here, about the change in gc.garbage meaning.
diff --git a/Doc/lib/libgc.tex b/Doc/lib/libgc.tex
index cfd563c..589bcb1 100644
--- a/Doc/lib/libgc.tex
+++ b/Doc/lib/libgc.tex
@@ -83,7 +83,11 @@
\begin{datadesc}{garbage}
A list of objects which the collector found to be unreachable
-but could not be freed (uncollectable objects). Objects that have
+but could not be freed (uncollectable objects). By default, this list
+contains only objects with \method{__del__()} methods.\footnote{Prior to
+ Python 2.2, the list contained all instance objects in unreachable
+ cycles, not only those with \method{__del__()} methods.}
+Objects that have
\method{__del__()} methods and create part of a reference cycle cause
the entire reference cycle to be uncollectable. If
\constant{DEBUG_SAVEALL} is set, then all unreachable objects will
diff --git a/Misc/NEWS b/Misc/NEWS
index 02c4928..c0f09ae 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -32,6 +32,11 @@
Extension modules
+- By default, the gc.garbage list now contains only those instances in
+ unreachable cycles that have __del__ methods; in 2.1 it contained all
+ instances in unreachable cycles. "Instances" here has been generalized
+ to include instances of both new-style and old-style classes.
+
- The socket module defines a new method for socket objects,
sendall(). This is like send() but may make multiple calls to
send() until all data has been sent. Also, the socket function has