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    Object for wrapping/filling text.  The public interface consists of
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    you'll probably have to override _wrap_chunks().

Several instance attributes control various aspects of wrapping:
      width (default: 70)
        the maximum width of wrapped lines (unless break_long_words
        is false)
      initial_indent (default: "")
        string that will be prepended to the first line of wrapped
        output.  Counts towards the line's width.
      subsequent_indent (default: "")
        string that will be prepended to all lines save the first
        of wrapped output; also counts towards each line's width.
      expand_tabs (default: true)
        Expand tabs in input text to spaces before further processing.
        Each tab will become 1 .. 8 spaces, depending on its position in
        its line.  If false, each tab is treated as a single character.
      replace_whitespace (default: true)
        Replace all whitespace characters in the input text by spaces
        after tab expansion.  Note that if expand_tabs is false and
        replace_whitespace is true, every tab will be converted to a
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      fix_sentence_endings (default: false)
        Ensure that sentence-ending punctuation is always followed
        by two spaces.  Off by default because the algorithm is
        (unavoidably) imperfect.
      break_long_words (default: true)
        Break words longer than 'width'.  If false, those words will not
        be broken, and some lines might be longer than 'width'.
      break_on_hyphens (default: true)
        Allow breaking hyphenated words. If true, wrapping will occur
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      drop_whitespace (default: true)
        Drop leading and trailing whitespace from lines.
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Munge whitespace in text: expand tabs and convert all other
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Split the text to wrap into indivisible chunks.  Chunks are
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Correct for sentence endings buried in 'chunks'.  Eg. when the
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Handle a chunk of text (most likely a word, not whitespace) that
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Wrap a sequence of text chunks and return a list of lines of
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Reformat the single paragraph in 'text' so it fits in lines of
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Reformat the single paragraph in 'text' to fit in lines of no
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Reformat the single paragraph in 'text' to fit in lines of no more
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