Fixing indentation in 'create action' tutorial

Partially implements blueprint mistral-documentation

Change-Id: I50fa230684b4ef64f7f6ae81d342d670eb5bf695

doc/source/developer/creating_custom_action.rst

@@ -1,48 +1,53 @@
+=============================
 How to write an Action Plugin
 =============================
 
 1. Write a class inherited from mistral.actions.base.Action
-::
 
- from mistral.actions import base
+ .. code-block:: python
 
- class RunnerAction(base.Action):
-    def __init__(self, param):
-        # store the incomming params
-        self.param = param
+    from mistral.actions import base
 
-    def run(self):
-        # return your results here
-        return {'status': 0}
+    class RunnerAction(base.Action):
+        def __init__(self, param):
+            # store the incomming params
+            self.param = param
 
-2. Publish the class in a namespace
-   (in your setup.cfg)
+        def run(self):
+            # return your results here
+            return {'status': 0}
 
-::
 
- [entry_points]
- mistral.actions =
-    example.runner = my.mistral_plugins.somefile:RunnerAction
+2. Publish the class in a namespace (in your ``setup.cfg``)
+
+
+ .. code-block:: ini
+
+   [entry_points]
+   mistral.actions =
+       example.runner = my.mistral_plugins.somefile:RunnerAction
 
 3. Reinstall Mistral if it was installed in system (not in virtualenv).
-4. Run Db-sync tool via either::
 
-    *tools/sync_db.sh --config-file <path-to-config>*
+4. Run db-sync tool via either
 
-or::
+ .. code-block:: console
 
-    *mistral-db-manage --config-file <path-to-config> populate*
+    $ tools/sync_db.sh --config-file <path-to-config>
 
-5. Use your plugin
+ or
 
- * Now you can call the action "example.runner"
+ .. code-block:: console
 
-::
+    $ mistral-db-manage --config-file <path-to-config> populate
 
- Workflow:
-   tasks:
-     myaction:
-       action: example.runner
-       parameters:
-         param: avalue_to_pass_in
+5. Now you can call the action ``example.runner``
 
+  .. code-block:: yaml
+
+    my_workflow:
+      tasks:
+        my_action_task:
+          action: example.runner
+          input:
+            param: avalue_to_pass_in