Exercise generator fails to keep an empty line between some generated execute blocks

[BNAndras]

https://github.com/exercism/problem-specifications/blob/main/exercises/dnd-character/canonical-data.json

The other executes have an empty line in between, but these two don't.

Execute (ability modifier for score 18 is +4):
  let g:score = 18
  let g:expected = 4
  AssertEqual g:expected, Modifier(g:score)
Execute (random ability is within range):
  let g:expected = "score >= 3 && score <= 18"
  AssertEqual g:expected, Ability()