python.lark failed to pare special forms of with_stmt

[Joxos]

Describe the bug

python.lark failed to pare special forms of with_stmt

To Reproduce

I'm using the newest python.lark in grammar/ and tried to parse:

with (open("a.txt") as a,
      open("b.txt") as b):
    pass

which is valid in Python 3.13. However, the grammar in python.lark is:

with_stmt: "with" with_items ":" suite
with_items: with_item ("," with_item)*
with_item: test ["as" name]

It seems like this file doesn't realized such grammar. When using lark to parse the codes it raises something like:
lark.exceptions.UnexpectedToken: Unexpected token Token('AS', 'as') at line 291, column 21.

Though this grammar file can parse this feature in another form:

with open("a.txt") as a, open("b.txt") as b):
    pass

[Joxos]

Added that

with (open("a.txt") as a,):
    pass

# exception group
#try:
    risky()
except* ValueError:
    handle_value()
except* TypeError as e:
    handle_type(e)

# type statement
type Point = tuple[float, float]

type Vector[T] = list[T]
type Pair[T, U] = tuple[T, U]

type Callback = Callable[[int, str], bool]

are also not supported in python.lark, and the grammar file requires an ending blank line, which is recommended, not restricted.

[Joxos]

Added that

decorated: decorators (classdef | funcdef | async_funcdef)

async_funcdef: "async" funcdef

async_stmt: "async" (funcdef | with_stmt | for_stmt)

can cause confustion since lark seems to always fit in pattern "async" funcdef, making async_funcdef useless.