Start universal parser from Python 2.*
Format keyword names in lexers
Port lexer helpers from 3.* to univer
True and False are keywords in univer now
Add nonlocal support to univer
Add Python 3.* func def syntax to univer
Add ellipsis support to univer parser
Remove trailing whitespace
Rename some symbols in univer parser
Add support Python 3 class def to univer
Add support for extended iterable unpacking to univer
Rename symbol in univer parser
Remove redundant case from univer parser
Fix comment
Remove weird comment
Improve list annotation in univer parser
Remove unused rules from univer parser
Fix subscript comment
Update atom comment
Add support for dict comprehensions to univer parser