Demote warnings to notices where appropriate, following the goal that as few "red box" warnings
should clutter the docs as possible.  Part 1: stuff that gets merged to Py3k.
diff --git a/Doc/documenting/markup.rst b/Doc/documenting/markup.rst
index 3ca8983..1d1023a 100644
--- a/Doc/documenting/markup.rst
+++ b/Doc/documenting/markup.rst
@@ -594,11 +594,11 @@
 
 .. describe:: warning
 
-   An important bit of information about an API that a user should be very aware
-   of when using whatever bit of API the warning pertains to.  The content of
-   the directive should be written in complete sentences and include all
-   appropriate punctuation. This differs from ``note`` in that it is recommended
-   over ``note`` for information regarding security.
+   An important bit of information about an API that a user should be aware of
+   when using whatever bit of API the warning pertains to.  The content of the
+   directive should be written in complete sentences and include all appropriate
+   punctuation.  This should only be chosen over ``note`` for information
+   regarding the possibility of crashes, data loss, or security implications.
 
 .. describe:: versionadded