[clang] [clang-format] Fix short function merging with macro expansion (PR #204421)

[Jesse Rosenstock via cfe-commits]

jmr wrote:

> Can someobdy help me understand the problem.

The problem is that `void f() { MACRO(); }` will be formatted as
```
void f() { MACRO();
}
```
in some cases.

https://github.com/llvm/llvm-project/pull/204421/changes/5aadc828299075b763880fb3a70b3611e25100f5

https://github.com/llvm/llvm-project/pull/200210/changes#diff-f792cb68c6326bfd79858f805be93bc79d30ba6c16f30df9e22febb70cfa9059R385

https://github.com/llvm/llvm-project/pull/204421