Change formatting of PostScriptOp

[LaurenzV]

I hope that change is okay. It's very hard to deal with borrowed slices if your code building logic is based on recursion, which I believe shouldn't be uncommon (at least it's necessary in my case).

[LaurenzV]

and one more small change: having each operator on a new line looks very unreadable for long code, so I would suggest separating them by space instead.

[laurmaedje]

For what it's worth, you could probably keep the recursion and the borrowed data by using an arena data structure and it would be much more efficient. E.g. bumpalo (untyped, but it's okay since no Drop is needed here) or typed-arena (also works for Clone types, but fixed to one type). You would create an arena at the top level and pass it down (via immutable reference) and have just one allocation instead of many.

[LaurenzV]

Will look into it, thanks!

[LaurenzV]

Seems to work great. 😄 So it's only the formatting thing I would like to change.

[laurmaedje]

Thanks!