updated

git-svn-id: http://svn.code.sf.net/p/docutils/code/trunk/docutils@1578 929543f6-e4f2-0310-98a6-ba3bd3dd1d04

1 files changed, 9 insertions, 2 deletions

diff --git a/docs/howto/rst-directives.txt b/docs/howto/rst-directives.txt
index 377ca31ad..85a7b9a4b 100644
--- a/docs/howto/rst-directives.txt
+++ b/docs/howto/rst-directives.txt
@@ -132,8 +132,11 @@ value ``None``.  Three directive function attributes are recognized:
     argument (raises ``ValueError`` if found), returns ``None`` for
     valid flag options.
 
-  - ``unchanged``: Returns the argument, unchanged.  Raises
-    ``ValueError`` if no argument is found.
+  - ``unchanged_required``: Returns the text argument, unchanged.
+    Raises ``ValueError`` if no argument is found.
+
+  - ``unchanged``: Returns the text argument, unchanged.  Returns an
+    empty string ("") if no argument is found.
 
   - ``path``: Returns the path argument unwrapped (with newlines
     removed).  Raises ``ValueError`` if no argument is found or if the
@@ -142,6 +145,10 @@ value ``None``.  Three directive function attributes are recognized:
   - ``nonnegative_int``: Checks for a nonnegative integer argument,
     and raises ``ValueError`` if not.
 
+  - ``class_option``: Converts the argument into an ID-compatible
+    string and returns it.  Raises ``ValueError`` if no argument is
+    found.
+
   A further utility function, ``choice``, is supplied to enable
   options whose argument must be a member of a finite set of possible
   values.  A custom conversion function must be written to use it.