class Rufo::Formatter

def visit_string_concat(node)
  # string1 string2
  # [:string_concat, string1, string2]
  _, string1, string2 = node
  visit string1
  has_backslash, first_space = skip_space_backslash
  if has_backslash
    write " \\"
    write_line
    write_indent
  else
    consume_space
  end
  visit string2
end