A potential solution to this, although slightly hacky, is to add garbage text at the end of the first line, and then make it transparent. For example, given the following issue:
You can just add some text after "Written", without a space in between:
...until the text wraps at the correct position, here, it reads as "Writtener by". Then, it's just a matter of making the "er" transparent (just select it, and set the fill to
I have to say, I don't know if using the Warichu settings is the "professional" way of doing things, but I definitely finds it's the easiest. It's a tiny bit more effort to get things looking how you want them to in the first place, but you then have a lot more flexibility and room to do minor changes (typo on an actor's name, missing credit, etc...), as you don't need to worry about the wrapping and spacing between the credits.