code: func block(maybeArray interface{}) string {
  	s := toSliceString(maybeArray)
  	if len(s) == 0 {
  		return "{}"
  	}
  	return indent("{\n"+join(s, "\n")) + "\n}"
  }
docs: // Given array, print each item on its own line, wrapped in an indented "{ }" block.