testsuite: Fix up cpp23/auto-fncast11.C testcase [PR103408]

This test fails:
+FAIL: g++.dg/cpp23/auto-fncast11.C  -std=c++2b  (test for errors, line 19)
+FAIL: g++.dg/cpp23/auto-fncast11.C  -std=c++2b (test for excess errors)
because the regex in dg-error was missing an indefinite article.

2021-12-15  Jakub Jelinek  <jakub@redhat.com>

	PR c++/103408
	* g++.dg/cpp23/auto-fncast11.C: Fix expected diagnostic wording.

diff --git a/gcc/testsuite/g++.dg/cpp23/auto-fncast11.C b/gcc/testsuite/g++.dg/cpp23/auto-fncast11.C
index 669dda1..1ae0426 100644 (file)
--- a/gcc/testsuite/g++.dg/cpp23/auto-fncast11.C
+++ b/gcc/testsuite/g++.dg/cpp23/auto-fncast11.C
@@ -16,4 +16,4 @@ static_assert(requires { requires auto(auto(true)); });
 static_assert(!requires { requires auto(false); });
 static_assert(!requires { requires auto(auto(false)); });
 
-auto f() requires (auto(false)); // { dg-error "constraints on non-templated" }
+auto f() requires (auto(false)); // { dg-error "constraints on a non-templated" }