[docs] [issue26213] Document BUILD_*_UNPACK opcodes

[Brett Cannon]

Brett Cannon added the comment:


New changeset 0705f66eb369aa6a6cdb699e24ff61e1ab2e0c56 by Brett Cannon (Ivan Levkivskyi) in branch 'master':
bpo-26213: Document _UNPACK bytecodes and BUILD_MAP changes (#238)
https://github.com/python/cpython/commit/0705f66eb369aa6a6cdb699e24ff61e1ab2e0c56


----------

_______________________________________
Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue26213>
_______________________________________