[clang-tools-extra] [clangd] Improve `BlockEnd` inlayhint presentation (PR #136106)

[Nathan Ridge via cfe-commits]

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@@ -147,6 +149,9 @@ std::string summarizeExpr(const Expr *E) {
     }
 
     // Literals are just printed
+    std::string VisitCXXNullPtrLiteralExpr(const CXXNullPtrLiteralExpr *E) {
+      return "nullptr";
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HighCommander4 wrote:

Could you add a small test case (or extend an existing one) that exercises this change? e.g. something like:

```c++
void foo(char *s) {
  if (s != nullptr) {
  }  // if s != nullptr
}

https://github.com/llvm/llvm-project/pull/136106