doc/md: fmt grpc methods (#2144)

doc/md/tutorial-grpc-service-generation-options.md

@@ -30,10 +30,7 @@ func (User) Annotations() []schema.Annotation {
 	return []schema.Annotation{
 		entproto.Message(),
 		entproto.Service(
-			entproto.Methods(
-				entproto.MethodCreate |
-                entproto.MethodGet
-            ),
+			entproto.Methods(entproto.MethodCreate | entproto.MethodGet),
         ),
 	}
 }