It's not material to the point, but I think there's a small typo on line 12 of the second "Finishing the example" snippet: it looks like
let instructions = gather args
let instructions = gather inputGlobs
You're quite right; thanks for letting me know. I'll get that fixed.
It's not material to the point, but I think there's a small typo on line 12 of the second "Finishing the example" snippet: it looks like
should be