Fix the docs for dig and nios.

The return docs for both of these didn't follow what the docs build
would understand.  Changed them so that they are properly formatted.

plugins/lookup/dig.py

@@ -70,29 +70,73 @@ RETURN = """
     description:
       - list of composed strings or dictonaries with key and value
         If a dictionary, fields shows the keys returned depending on query type
-    fields:
+    contains:
-       ALL: owner, ttl, type
+       ALL:
-       A: address
+           description:
-       AAAA: address
+               - owner, ttl, type
-       CNAME: target
+       A:
-       DNAME: target
+           description:
-       DLV: algorithm, digest_type, key_tag, digest
+               - address
-       DNSKEY: flags, algorithm, protocol, key
+       AAAA:
-       DS: algorithm, digest_type, key_tag, digest
+           description:
-       HINFO:  cpu, os
+               - address
-       LOC: latitude, longitude, altitude, size, horizontal_precision, vertical_precision
+       CNAME:
-       MX: preference, exchange
+           description:
-       NAPTR: order, preference, flags, service, regexp, replacement
+               - target
-       NS: target
+       DNAME:
-       NSEC3PARAM: algorithm, flags, iterations, salt
+           description:
-       PTR: target
+               - target
-       RP: mbox, txt
+       DLV:
-       SOA: mname, rname, serial, refresh, retry, expire, minimum
+            description:
-       SPF: strings
+                - algorithm, digest_type, key_tag, digest
-       SRV: priority, weight, port, target
+       DNSKEY:
-       SSHFP: algorithm, fp_type, fingerprint
+            description:
-       TLSA: usage, selector, mtype, cert
+                - flags, algorithm, protocol, key
-       TXT: strings
+       DS:
+            description:
+                - algorithm, digest_type, key_tag, digest
+       HINFO:
+            description:
+                -  cpu, os
+       LOC:
+            description:
+                - latitude, longitude, altitude, size, horizontal_precision, vertical_precision
+       MX:
+            description:
+                - preference, exchange
+       NAPTR:
+            description:
+                - order, preference, flags, service, regexp, replacement
+       NS:
+            description:
+                - target
+       NSEC3PARAM:
+            description:
+                - algorithm, flags, iterations, salt
+       PTR:
+            description:
+                - target
+       RP:
+            description:
+                - mbox, txt
+       SOA:
+            description:
+                - mname, rname, serial, refresh, retry, expire, minimum
+       SPF:
+            description:
+                - strings
+       SRV:
+            description:
+                - priority, weight, port, target
+       SSHFP:
+            description:
+                - algorithm, fp_type, fingerprint
+       TLSA:
+            description:
+                - usage, selector, mtype, cert
+       TXT:
+            description:
+                - strings
 """
 
 from ansible.errors import AnsibleError

plugins/lookup/nios.py

@@ -85,8 +85,9 @@ obj_type:
   type: complex
   contains:
     obj_field:
-      - One or more obj_type fields as specified by return_fields argument or
+      description:
-        the default set of fields as per the object type
+        - One or more obj_type fields as specified by return_fields argument or
+          the default set of fields as per the object type
 """
 
 from ansible.plugins.lookup import LookupBase