Fix some mistake and format in docs

Change-Id: I4280d50412c4915aa085c5c1d8f449d0dc323161

doc/source/arch.rst

@@ -2,7 +2,7 @@
 CloudKitty's Architecture
 =========================
 
-CloudKitty can be cut in four big parts:
+CloudKitty can be cut in five big parts:
 
 * API
 * Data collection (collector)
@@ -110,6 +110,10 @@ Example of minimal rating module (taken from the Noop module):
             """
             return True
 
+        @property
+        def priority(self):
+            return 1
+
         def reload_config(self):
             pass
 

doc/source/installation.rst

@@ -59,9 +59,9 @@ Install the dashboard module
 
     PY_PACKAGES_PATH=`pip --version | cut -d' ' -f4`
 
-#. Add the enabled file to the horizon settings or installation. Depending on
+#. Add the enabled file to the horizon settings or installation.
-your setup, you might need to add it to ``/usr/share`` or directly in the
+   Depending on your setup, you might need to add it to ``/usr/share`` or
-horizon python package::
+   directly in the horizon python package::
 
     # If horizon is installed by packages:
     ln -sf $PY_PACKAGES_PATH/cloudkittydashboard/enabled/_[0-9]*.py \

doc/source/rating/introduction.rst

@@ -10,8 +10,24 @@ operator can set the priority for a module. The order in which the modules
 process the data depends on their priority. The module with the highest
 priority comes first.
 
+List current modules
+====================
+
+List current rating modules:
+
+.. code:: raw
+
+    $ cloudkitty module-list
+    +-----------+---------+----------+
+    | Module    | Enabled | Priority |
+    +-----------+---------+----------+
+    | hashmap   | False   | 1        |
+    | noop      | True    | 1        |
+    | pyscripts | True    | 1        |
+    +-----------+---------+----------+
+
 Enable or disable module
-==========================
+========================
 
 Enable the hashmap rating module: