Yapf: PEP 448 is unsupported

[haphut]

yapf 0.11.0 with CPython 3.5.2 chokes on:

foo = {'a': 1}
bar = {'b': 2}
baz = {**foo, **bar}

[vmesel]

@gwelymernans how can I help solving this issue?

[gwelymernans]

@vmesel I think the only thing that needs to be done is the lib2to3 library needs to be updated to support those constructs.

[haphut]

I think this is the relevant bug: https://bugs.python.org/issue25969