Document the import semantics that if None is found in sys.modules for a module then ImportError is raised.
diff --git a/Misc/NEWS b/Misc/NEWS
index ea061a7..5189aae 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -174,6 +174,9 @@
 Documenation
 ------------
 
+- Document that importing a module that has None in sys.modules triggers an
+  ImportError.
+
 - Issue #6556: Fixed the Distutils configuration files location explanation
   for Windows.