Do not close external file objects passed to tarfile.open(mode='w:bz2')
when the TarFile is closed.
diff --git a/Misc/NEWS b/Misc/NEWS
index 4f1c3c7..1decc90 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -63,6 +63,9 @@
 Library
 -------
 
+- Do not close external file objects passed to tarfile.open(mode='w:bz2')
+  when the TarFile is closed.
+
 - Issue #2959: For consistency with other file-like objects, gzip's
   GzipFile.close() can now be called multiple times without raising
   an exception.