Fix a test case

the expressions don't subsume because they have different
parameter mappings

Author: cor3ntin

clang/test/SemaTemplate/instantiate-template-argument.cpp

@@ -9,21 +9,24 @@ concept C2 = C1<Y{}, V>;
 // sizeof(U) >= 4 [U = V (decltype(Y{}))]
 
 template<char W>
-constexpr int foo() requires C2<int, W> { return 1; }
+constexpr int foo() requires C2<int, W> { return 1; } // #cand1
 // sizeof(U) >= 4 [U = W (decltype(int{}))]
 
 template<char X>
 // expected-note@+1{{candidate function}}
-constexpr int foo() requires C1<1, X> && true { return 2; }
+constexpr int foo() requires C1<1, X> && true { return 2; } // #cand2
 // sizeof(U) >= 4 [U = X (decltype(1))]
 
-// GCC rejects it: https://godbolt.org/z/MWG756K8c
 static_assert(foo<'a'>() == 2);
+// expected-error@-1 {{call to 'foo' is ambiguous}}
+// expected-note@#cand1 {{candidate function}}
+// expected-note@#cand2 {{candidate function}}
 
 template<char Z>
-// expected-note@+1{{candidate function}}
-constexpr int foo() requires C2<long long, Z> && true { return 3; }
+constexpr int foo() requires C2<long long, Z> && true { return 3; } // #cand3
 // sizeof(U) >= 4 [U = Z (decltype(long long{}))]
 
 static_assert(foo<'a'>() == 3);
-// expected-error@-1{{call to 'foo' is ambiguous}}
+// expected-error@-1{{call to 'foo' is ambiguous}}
+// expected-note@#cand1 {{candidate function}}
+// expected-note@#cand3 {{candidate function}}