multi-cursor for extend selection and unwrap

[Gregoor]

let results = [≤square≥(42), square(23)];

Call "select next occurence" (Cmd + d) and then move into the parens and "extend selection" (Shift + up):

let results = [square(≤42≥), square(≤23≥)];

Now hit "unwrap" (Option + up) and you'd get:

let results = [42, 23];