added docstring for system_message

git-svn-id: http://svn.code.sf.net/p/docutils/code/trunk/docutils@3669 929543f6-e4f2-0310-98a6-ba3bd3dd1d04

1 files changed, 7 insertions, 0 deletions

diff --git a/docutils/nodes.py b/docutils/nodes.py
index 60af8298b..8ff275129 100644
--- a/docutils/nodes.py
+++ b/docutils/nodes.py
@@ -1240,6 +1240,13 @@ class entry(Part, Element): pass
 
 class system_message(Special, BackLinkable, PreBibliographic, Element):
 
+    """
+    System message element.
+
+    Do not instantiate this class directly; use
+    ``document.reporter.info/warning/error/severe()`` instead.
+    """
+
     def __init__(self, message=None, *children, **attributes):
         if message:
             p = paragraph('', message)