Fix typo in error message

web/router.go

@@ -129,7 +129,7 @@ func parseHandler(h interface{}) Handler {
 		log.Fatalf("Unknown handler type %v. Expected a web.Handler, "+
 			"a http.Handler, or a function with signature func(C, "+
 			"http.ResponseWriter, *http.Request) or "+
-			"func(http.ResponseWriter, http.Request)", h)
+			"func(http.ResponseWriter, *http.Request)", h)
 	}
 	panic("log.Fatalf does not return")
 }