Testing surround.vim's cs with multi-line braces

input

{
    foo
    bar
    baz
}

(
    foo
    bar
    baz
)

something {
    foo
    bar
    baz
}

something (
    foo
    bar
    baz
)

output1 - cs{(

(
foo
    bar
    baz
)

{
foo
    bar
    baz
}

something ( foo
    bar
    baz
 )

something { foo
    bar
    baz
 }

output2 - cs})

    (
    foo
    bar
    baz
    )

    {
    foo
    bar
    baz
    }

something (    foo
    bar
    baz
)

something {    foo
    bar
    baz
}

surround_test.vim

let s:changes = [
      \ ['a', 2, '{(', '})'],
      \ ['b', 8, '({', ')}'],
      \ ['c', 14, '{(', '})'],
      \ ['d', 20, '({', ')}'],
      \ ]

function SetMarks()
  for change in s:changes
    exec change[1] 'mark' change[0]
  endfor
endfunction

function MakeChanges(w)
  for change in s:changes
    exec 'normal `'.change[0].'$cs'.change[a:w]
  endfor
endfunction

set noautoindent nosmartindent nocindent indentexpr=
let g:surround_indent = 0

edit input
call SetMarks()
call MakeChanges(2)
saveas! output1

edit input
call SetMarks()
call MakeChanges(3)
saveas! output2