[kupfer] doc: Mention some plugins as examples

[Ulrik Sverdrup <usverdrup src gnome org>]

commit c7088d84e07f3ad410dd70289c32a58d179af458
Author: Ulrik Sverdrup <ulrik sverdrup gmail com>
Date:   Mon Apr 4 03:54:04 2011 +0200

    doc: Mention some plugins as examples

 Documentation/PluginAPI.rst |   17 ++++++++++++++++-
 1 files changed, 16 insertions(+), 1 deletions(-)
---
diff --git a/Documentation/PluginAPI.rst b/Documentation/PluginAPI.rst
index 8af077c..77f484a 100644
--- a/Documentation/PluginAPI.rst
+++ b/Documentation/PluginAPI.rst
@@ -732,7 +732,7 @@ Each category has a specific format of required data that is defined in
 ``kupfer.plugin_support.register_alternative(caller, category_key, id_, **kwargs)`` 
 to register their implementations of new alternatives. The arguments are:
 
-.. topic:: ``register_alternative(caller, category_key, id_, **kwargs)``
+.. topic:: ``register_alternative(caller, category_key, id_, ** kwargs)``
 
     :``caller``:       the name of the calling plugin, is always ``__name__``
     :``category_key``: one of the above categories
@@ -756,6 +756,21 @@ directories. Package modules can also be installed as ``.zip`` files, so
 they too can be distributed as single files.
 
 
+Example Plugins
+===============
+
+I want to specifically highlight certain files in Kupfer that are good
+to read as examples.
+
++ Custom Leaf and Action: the common case of creating a custom
+  ``Leaf`` type and defining its default ``Open`` action, see
+  ``kupfer/plugin/notes.py``
++ Content decoration: making content for objects, see
+  ``kupfer/plugin/archiveinside.py`` (*Deep Archives* plugin)
++ Asynchronous error reporting: see ``kupfer/plugin/volumes.py``, action
+  *Unmount*
+
+
 
 Reference to the ``kupfer`` Package
 ===================================