Before:
  Save &l:statusline

After:
  Restore

Execute(ALE shouldn't do much of anything for ctrlp-funky buffers):
  Assert !ale#ShouldDoNothing(bufnr('')), 'The preliminary check failed'

  let &l:statusline = '%#CtrlPMode2# prt %*%#CtrlPMode1# line %* <mru>={%#CtrlPMode1# funky %*}=<fil> <-> %=%<%#CtrlPMode2# %{getcwd()} %*'

  Assert ale#ShouldDoNothing(bufnr(''))