Multiple nested function calls are not split in C

[miline]

return check_if_6(add(1,2,3));

In above code arguments to add wont be split to new lines.

Would be nice to have this.

[AndrewRadev]

Seems like functions weren't being detected correctly in nested calls, I've pushed a commit that should fix this. Could you try it out and let me know if it works for you?