Update draft-ietf-oauth-v2-1.md

Author: ioggstream

draft-ietf-oauth-v2-1.md

@@ -989,7 +989,7 @@ defined by this specification MUST NOT be included more than once.
 Parameters sent without a value MUST be treated as if they were
 omitted from the request.
 
-An authorization endpoints that redirects a request potentially containing
+An authorization endpoint that redirects a request potentially containing
 user credentials MUST NOT forward these credentials to untrusted parties
 (see {{redirect_307}} for details).