against a module compiled to the filesystem would
  fail trying to produce a RichTraceback due to the
  content being in bytes. [ticket:209]

  from tuple to frozenset, as this is expected to be
  a set by default.  [ticket:208]

- fix test_exceptions to always call non-pygments tests
- update test for py3k transition

  TemplateLookup, allows alternate Lexer classes
  to be used.

waiting on further detail what I'm missing here

- dont need 2to3
- clean up some list() calls we dont need

having some weird unicode issues I can't debug; the meaning of
str.encode() seems to be changing globally somehow

- changelog

Changed keyword argument from futures to future_imports for clarity.
Added docstring describing use.

Now set to None.

Provide a list of names to import from __future__ to Template or
TemplateLookup, and it will render the import from __future__
statement at the top of the generated code so that it actually works.

  Markupsafe isn't installed, was using an inline-compiled
  regexp which causes major slowdowns on Python 3.3;
  is now precompiled.

  raise exception when non-existent plugin
  is specified.

  <%text> tag so that it pulls locally specified
  identifiers from the context the same
  way as that of <%block> and <%filter>.

  function arguments inside pure-python def
  or lambda expressions.  [ticket:201]

  parsing for Py2.4 was broken.
  [ticket:193]

  involving variables declared in defs and such,
  which only became apparent when
  the strict_undefined flag was turned on.
  [ticket:192]

  same time args passed to def() are used
  by other elements of the <%def> tag.
  [ticket:191]