[docs] [issue13766] explain the relationship between Lib/lib2to3/Grammar.txt and Grammar/Grammar

[Roundup Robot]

Roundup Robot <devnull at psf.upfronthosting.co.za> added the comment:

New changeset 8f7e707ab729 by Benjamin Peterson in branch '3.2':
explain why we need this grammar file (closes #13766)
http://hg.python.org/cpython/rev/8f7e707ab729

New changeset ecc998ec8c6f by Benjamin Peterson in branch 'default':
merge 3.2 (#13766)
http://hg.python.org/cpython/rev/ecc998ec8c6f

New changeset 5d1c177c585b by Benjamin Peterson in branch '2.7':
explain why we need this grammar file (closes #13766)
http://hg.python.org/cpython/rev/5d1c177c585b

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nosy: +python-dev
resolution:  -> fixed
stage:  -> committed/rejected
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue13766>
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