Complete textwrap.wrap() with 6 missing params!
**New** Parameters ``expand_tabs``, ``replace_whitespace``, ``fix_sentence_endings``,
``drop_whitespace``, ``max_lines``, and ``placeholder`` for ``wrap()``, completing stdlib
``textwrap.wrap()`` compatibility.
Wrote code mostly for 'drop_whitespace' and 'placeholder', and found a
very peculiar bug in standard python's textwrap fix_sentence_endings,
that '\n' is "of length 1" -- the other parameters simply needed to be
"wired in".