helper.py, pysource: has code to flatten list used in n_list and n_build_tuple_unpack_with_call
parse3{5,6}.py: localize grammar rules with BEFORE_ASYNC_WITH
1. parse2.py: try except in a loop with a (virtual) continue
treat CONTINUE like JUMP_ABSOLUTE which it is
2. in taking methods off of constants, a parenthesis needs to be added
Some refactoring of global code done