[clang-format] Improper formatting of `operator*`

Currently with LLVM's default format settings we get the following results:

```C++

std::complex a;
std::complex b;

auto c = a * b; // correctly formated by clang-format
a* b; // incorrectly formatted, the * is attached to the first argument
```

The desired result is to get consistent formatting:

```C++

std::complex a;
std::complex b;

auto c = a * b; // OK
a * b; // OK
```

An actual screenshot: