Added note about using the documentation build tools under Cygwin.
diff --git a/Misc/NEWS b/Misc/NEWS
index 3d55574..50708d2 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -177,6 +177,9 @@
   preprocessor symbols were eliminated.  The internal decisions they
   controlled stopped being experimental long ago.
 
+- The tools used to build the documentation now work under Cygwin as
+  well as Unix.
+
 C API
 
 - PyNumber_Coerce() and PyNumber_CoerceEx() now also invoke the type's