api-ref: verify os-server-groups.inc

this verify the os-server-groups.inc for sample and body.
Added other minor update for better formatting.

Part of bp:api-ref-in-rst

Change-Id: I00e8c4025310d23244ef0f6a5ed276573ecaea7b

api-ref/source/os-server-groups.inc

@@ -1,6 +1,4 @@
 .. -*- rst -*-
-.. needs:example_verification
-.. needs:body_verification
 
 ==================================
  Server groups (os-server-groups)
@@ -106,7 +104,6 @@ Request
 
 .. rest_parameters:: parameters.yaml
 
-
   - server_group_id: server_group_id
 
 Response
@@ -148,3 +145,5 @@ Request
 
 Response
 --------
+
+There is no body content for the response of a successful DELETE action.

api-ref/source/parameters.yaml

@@ -2309,7 +2309,7 @@ policies:
   description: |
     A list of one or more policy names to associate with the server group. The list
     must contain at least one policy name. The current valid policy names are ``anti-affinity``
-    , ``affinity``, ``soft-anti-affinity`` and 'soft-affinity', the latter two were
+    , ``affinity``, ``soft-anti-affinity`` and ``soft-affinity``, the latter two were
     added in microversion 2.15.  Each policy name must be a non-empty string with
     no leading or trailing spaces. Maximum length is 255 characters.
   in: body