Correctly detect bzip2 compressed streams with blocksizes other than 900k.
diff --git a/Misc/NEWS b/Misc/NEWS
index e65e805..8640d70 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -90,6 +90,9 @@
 Library
 -------
 
+- tarfile.py: Correctly detect bzip2 compressed streams with blocksizes
+  other than 900k.
+
 - Issue #13439: Fix many errors in turtle docstrings.
 
 - Issue #13487: Make inspect.getmodule robust against changes done to