Creation declaration/definition that targets a new file (or an empty one) has 2 extra newlines if clang-format isn't used

In test.h, do Create Declaration/Definition on
```cpp
void func();
```
with an empty test.cpp.

Bug: The result has 2 extra newlines:

```cpp
#include "test.h"



void func()
{
}
```

It's possible the root cause issue might result in other bugs, not sure though.