    # File lib/action_mailer/vendor/text-format-0.6.3/text/format.rb, line 963
        def initialize(arg = nil, &block)
          case arg
          when Text::Format
            __create(arg.text) do
              @columns        = arg.columns
              @tabstop        = arg.tabstop
              @first_indent   = arg.first_indent
              @body_indent    = arg.body_indent
              @format_style   = arg.format_style
              @left_margin    = arg.left_margin
              @right_margin   = arg.right_margin
              @extra_space    = arg.extra_space
              @tag_paragraph  = arg.tag_paragraph
              @tag_text       = arg.tag_text
              @abbreviations  = arg.abbreviations
              @nobreak        = arg.nobreak
              @nobreak_regex  = arg.nobreak_regex
              @text           = arg.text
              @hard_margins   = arg.hard_margins
              @split_words    = arg.split_words
              @split_rules    = arg.split_rules
              @hyphenator     = arg.hyphenator
            end
            instance_eval(&block) unless block.nil?
          when Hash
            __create do
              @columns       = arg[:columns]       || arg['columns']       || @columns
              @tabstop       = arg[:tabstop]       || arg['tabstop']       || @tabstop
              @first_indent  = arg[:first_indent]  || arg['first_indent']  || @first_indent
              @body_indent   = arg[:body_indent]   || arg['body_indent']   || @body_indent
              @format_style  = arg[:format_style]  || arg['format_style']  || @format_style
              @left_margin   = arg[:left_margin]   || arg['left_margin']   || @left_margin
              @right_margin  = arg[:right_margin]  || arg['right_margin']  || @right_margin
              @extra_space   = arg[:extra_space]   || arg['extra_space']   || @extra_space
              @text          = arg[:text]          || arg['text']          || @text
              @tag_paragraph = arg[:tag_paragraph] || arg['tag_paragraph'] || @tag_paragraph
              @tag_text      = arg[:tag_text]      || arg['tag_text']      || @tag_text
              @abbreviations = arg[:abbreviations] || arg['abbreviations'] || @abbreviations
              @nobreak       = arg[:nobreak]       || arg['nobreak']       || @nobreak
              @nobreak_regex = arg[:nobreak_regex] || arg['nobreak_regex'] || @nobreak_regex
              @hard_margins  = arg[:hard_margins]  || arg['hard_margins']  || @hard_margins
              @split_rules   = arg[:split_rules] || arg['split_rules'] || @split_rules
              @hyphenator    = arg[:hyphenator] || arg['hyphenator'] || @hyphenator
            end
            instance_eval(&block) unless block.nil?
          when String
            __create(arg, &block)
          when NilClass
            __create(&block)
          else
            raise TypeError
          end
        end