Un-revert change from 8e5f2e0 reverted in daf9522 (#1079)

index.bs

@@ -3970,7 +3970,8 @@ the attestation=] is consistent with the fields of the attestation certificate's
             trusted execution environment, otherwise use the union of `teeEnforced` and `softwareEnforced`.
             - The value in the `AuthorizationList.origin` field is equal to `KM_ORIGIN_GENERATED`.
             - The value in the `AuthorizationList.purpose` field is equal to `KM_PURPOSE_SIGN`.
-    - If successful, return attestation type [=Basic=] with the [=attestation trust path=] set to |x5c|.
+    - If successful, return implementation-specific values representing [=attestation type=] [=Basic=] and [=attestation trust
+        path=] |x5c|.
 
 ### Android Key Attestation Statement Certificate Requirements ### {#key-attstn-cert-requirements}