0.6:
New features
* New astor.rtrip command-line tool to test round-tripping of Python source to AST and back to source. (Contributed by Patrick Maupin.)
* New pretty printer outputs much better looking code:
. Remove parentheses where not necessary
. Use triple-quoted strings where it makes sense
. Add placeholder for function to do nice line wrapping on output
* Additional Python 3.5 support: - Additional unpacking generalizations (PEP 448)
. Async and await (PEP 492)
* Added Python 3.6 feature support:
. f-strings (PEP 498)
. async comprehensions (PEP 530)
. variable annotations (PEP 526)
* Code cleanup, including renaming for PEP8 and deprecation of old names. See :ref:`deprecations` for more information.
Bug fixes
* Don't put trailing comma-spaces in dictionaries. astor will now create {'three': 3} instead of {'three': 3, }.
* Fixed several bugs in code generation.
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