Option for formatting subitem-item spacing

[LecrisUT]

Context

Currently the formatter would change

- item A
  - item A.a
- item B

as:

- item A

  - item A.a

- item B

Proposal

Have an option to disable the spaces between item and subitems, i.e. format as the original:

- item A
  - item A.a
- item B

Tasks and updates

No response

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