Merge pull request OAI#1210 from OAI/issue-1121

clarified wording

Author: webron

versions/3.0.md

@@ -2759,8 +2759,8 @@ components:
       "Pet": {
         "type": "object",
         "discriminator": {
-	  "propertyName": "petType"
-	},
+          "propertyName": "petType"
+        },
         "properties": {
           "name": {
             "type": "string"
@@ -2940,7 +2940,7 @@ MyResponseType:
       monster: 'https://gigantic-server.com/schemas/Monster/schema.json'
 ```
 
-Here the discriminator _value_ of `dog` will map to the schema `#/components/schemas/Dog`, rather than the default (implicit) value of `Dog`.  If the discriminator _value_ does not match an implicit or explicit mapping, no schema can be determined and validation SHOULD fail. Mapping keys MUST be string values, but tooling MAY map response values to strings for comparison.
+Here the discriminator _value_ of `dog` will map to the schema `#/components/schemas/Dog`, rather than the default (implicit) value of `Dog`.  If the discriminator _value_ does not match an implicit or explicit mapping, no schema can be determined and validation SHOULD fail. Mapping keys MUST be string values, but tooling MAY convert response values to strings for comparison.
 
 When used in conjunction with the `anyOf` construct, the use of the discriminator can avoid ambiguity where multiple schemas may satisfy a single payload.