startswith and endswith don't accept None as slice index. Patch by Torsten Becker. (closes #11828)
diff --git a/Misc/NEWS b/Misc/NEWS
index 1a5784a..663846f 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -38,6 +38,9 @@
 - Issue #8278: On Windows and with a NTFS filesystem, os.stat() and os.utime()
   can now handle dates after 2038.
 
+- issue #11828: startswith and endswith don't accept None as slice index.
+  Patch by Torsten Becker.
+
 - Issue #4236: PyModule_Create2 now checks the import machinery directly
   rather than the Py_IsInitialized flag, avoiding a Fatal Python
   error in certain circumstances when an import is done in __del__.