cli 3.6.2

• ansi_collapse(x, trunc = 1, style = "head") now indeed shows one
  element if length(x) == 2, as documented (@salim-b, #572).

• ansi_collapse() gains a sep2 argument to specify a seperate separator
  for length-two inputs. It defaults to " and " which, in conjunction with
  the other defaults, produces a collapsed string that fully adheres to the
  serial comma rules.
  (@salim-b, #569)

• ansi_string() is now an exported function (@multimeric, #573).