[Patch, fortran] PR28172, PR29389, PR29712 & PR30283 - some "one liner fixes"

[Paul Thomas]

François-Xavier,
>
>
> I'd say: leave that part alone, add a comment in the PR saying that
> this is only part of the trick. Less work, fewer opportunities to mess
> up with the tree, and mixing pure qualifier and statement functions
> probably isn't the most used F95 feature.
>
Thanks - the deed is done.

Paul