[clang] [clang][Sema] Improve template argument deduction diagnostic (PR #122754)

[Justin Fargnoli via cfe-commits]

================
@@ -1,4 +1,4 @@
 // RUN: %clang_cc1 -std=c++98 -fsyntax-only -verify %s
 // expected-no-diagnostics
 void f(void *);
-void g() { f(__nullptr); }
+void g() { f(__nullptr); }
----------------
justinfargnoli wrote:

```suggestion
void g() { f(__nullptr); }

```

https://github.com/llvm/llvm-project/pull/122754