# File text/format.rb, line 943
943:     def initialize(arg = nil, &block)
944:       case arg
945:       when Text::Format
946:         __create(arg.text) do
947:           @columns        = arg.columns
948:           @tabstop        = arg.tabstop
949:           @first_indent   = arg.first_indent
950:           @body_indent    = arg.body_indent
951:           @format_style   = arg.format_style
952:           @left_margin    = arg.left_margin
953:           @right_margin   = arg.right_margin
954:           @extra_space    = arg.extra_space
955:           @tag_paragraph  = arg.tag_paragraph
956:           @tag_text       = arg.tag_text
957:           @abbreviations  = arg.abbreviations
958:           @nobreak        = arg.nobreak
959:           @nobreak_regex  = arg.nobreak_regex
960:           @text           = arg.text
961:           @hard_margins   = arg.hard_margins
962:           @split_words    = arg.split_words
963:           @split_rules    = arg.split_rules
964:           @hyphenator     = arg.hyphenator
965:         end
966:         instance_eval(&block) unless block.nil?
967:       when Hash
968:         __create do
969:           @columns       = arg[:columns]       || arg['columns']       || @columns
970:           @tabstop       = arg[:tabstop]       || arg['tabstop']       || @tabstop
971:           @first_indent  = arg[:first_indent]  || arg['first_indent']  || @first_indent
972:           @body_indent   = arg[:body_indent]   || arg['body_indent']   || @body_indent
973:           @format_style  = arg[:format_style]  || arg['format_style']  || @format_style
974:           @left_margin   = arg[:left_margin]   || arg['left_margin']   || @left_margin
975:           @right_margin  = arg[:right_margin]  || arg['right_margin']  || @right_margin
976:           @extra_space   = arg[:extra_space]   || arg['extra_space']   || @extra_space
977:           @text          = arg[:text]          || arg['text']          || @text
978:           @tag_paragraph = arg[:tag_paragraph] || arg['tag_paragraph'] || @tag_paragraph
979:           @tag_text      = arg[:tag_text]      || arg['tag_text']      || @tag_text
980:           @abbreviations = arg[:abbreviations] || arg['abbreviations'] || @abbreviations
981:           @nobreak       = arg[:nobreak]       || arg['nobreak']       || @nobreak
982:           @nobreak_regex = arg[:nobreak_regex] || arg['nobreak_regex'] || @nobreak_regex
983:           @hard_margins  = arg[:hard_margins]  || arg['hard_margins']  || @hard_margins
984:           @split_rules   = arg[:split_rules] || arg['split_rules'] || @split_rules
985:           @hyphenator    = arg[:hyphenator] || arg['hyphenator'] || @hyphenator
986:         end
987:         instance_eval(&block) unless block.nil?
988:       when String
989:         __create(arg, &block)
990:       when NilClass
991:         __create(&block)
992:       else
993:         raise TypeError
994:       end
995:     end