Convert old rspec should syntax to new expect syntax

vimrc

function! ConvertShouldToExpect()
  let rspec_conversions = {
        \ 'should': 'to',
        \ 'should_not': 'not_to',
        \ 'should_receive': 'to receive',
        \ 'should_not_receive': 'not_to receive',
        \ }

  for [old, new] in items(rspec_conversions)
    execute "normal! " . ':%s/\v^(\s+)(.+)\.' . old . '>/\1expect(\2).' . new . '/ge' . "\<CR>"
  endfor
endfunction
nnoremap <Leader>cse :call ConvertShouldToExpect()<CR>