Improve formatting of lamba between parenthesis

[JaggerJo]

Description

input:

let square = (fun b ->
    b*b
    prinftn "%i" b*b
) 

formatted:

let square =
    (fun b ->
    b * b
    prinftn "%i" b * b)

Repro code

https://jindraivanek.gitlab.io/fantomas-ui/#?code=DYUwLgBAzgjgrgQwE4ggXggCgGZwHYQBGEAtAHwBQE1RAVIVTQA5ICWe2YBARAKSvc6DAJRA&config=N4Ig0gphAOByEHcA2BLAdhAggMwC4QCcQAuXAgVwgF8g