fix format

design/20200305-spec-v1alpha2-dependency-parampassing.md

@@ -27,7 +27,8 @@ We are proposing to add `dependencies` in AppConfig as follows:
 
 ```yaml
 kind: ApplicationConfiguration
-components:
+spec:
+- components:
   - componentName: mysql
   - componentName: web
     dependencies:
@@ -39,24 +40,20 @@ Here a component can describe its dependencies, or dependent components.
 For Case 1, we also suggest to use ServiceBinding in [trait-injector](https://github.com/oam-dev/trait-injector) to inject secret. It is a trait that should be applied before component starts. We propose to add `ordering` to express trait's ordering w.r.t the component.
 
 ```yaml
- - componentName: web
-    dependencies:
-      - mysql
-    traits:
-     - ordering: preStart # applied before component starts
-       trait:
-         kind: ServiceBinding
-         spec:
-           bindings:
-            - from:
-                secret:
-                  secretNameFrom: # Read secret name from MySQLInstance CR and then get secret
-                    apiVersion: ros.aliyun.com/v1alpha2
-                    kind: MySQLInstance
-                    name: mysql
-                    fieldPath: ".status.connection-secret"
-              to: # inject into Web Deployment's file path
-                filePath: /input/mysql-conn
+- componentName: web
+  dependencies:
+    - mysql
+  traits:
+    - ordering: preStart # applied before component starts
+      trait:
+        kind: ServiceBinding
+        spec:
+          bindings:
+          - from:
+              secret:
+                name: mysql-conn
+            to: # inject into Web Deployment's file path
+              filePath: /input/mysql-conn
 ```
 
 ### Parameter Passing
@@ -72,7 +69,7 @@ spec:
 
   - componentName: nas-mount-target
     dependencies:
-      - nas-file-system
+    - nas-file-system
     parameterValues:
     - name: filesystem-id
       from: