Add documentation for specification routes in SDK

src/api-documentation/controller-collection/delete-specifications.md

@@ -9,7 +9,6 @@ title: deleteSpecifications
 
 # deleteSpecifications
 
-
 <blockquote class="js">
 <p>
 **URL:** `http://kuzzle:7512/<index>/<collection>/_specifications`  
@@ -42,11 +41,11 @@ title: deleteSpecifications
   "collection": "<collection>",
   "action": "deleteSpecifications",
   "controller": "collection",
-  "result": {}
+  "result": true
 }
 ```
 
 Deletes the validation specification set for the <index>/<collection>.
 It responds 200 even there where no validation specification manually set before.
 
-***Note:*** by default, an empty specification is implicitally applied to all collections which. In a way, "no specification set" means "all documents are valid". This is why, using this route when no specifications have been set before, does not produce an error.
+***Note:*** by default, an empty specification is implicitly applied to all collections which. In a way, "no specification set" means "all documents are valid". This is why, using this route when no specifications have been set before, does not produce an error.