GH-130328: further speedup of pasting in new REPL on Windows by reading in chunks

[chris-eibl]

This is on top of #132884. So reviews should be done beginning with commit a64f4c4.

• Issue: Pasting in new REPL is slow #130328

[chris-eibl]

I've just copy-pasted this from

cpython/Lib/_pyrepl/unix_console.py

Lines 536 to 555 in e1c09ff

	def getpending(self):
	"""
	Get pending events from the console event queue.
	Returns:
	- Event: Pending event from the event queue.
	"""
	e = Event("key", "", b"")
	while not self.event_queue.empty():
	e2 = self.event_queue.get()
	e.data += e2.data
	e.raw += e.raw
	amount = 10000
	raw = self.__read(amount)
	data = str(raw, self.encoding, "replace")
	e.data += data
	e.raw += raw
	return e

and dropped the reading of the next chunk, since IMHO this does not fit the doc string.

mypy fires here

Lib/_pyrepl/windows_console.py:545: error: Item "None" of "Event | None" has no
attribute "data"  [union-attr]
                e.data += e2.data
                          ^~~~~~~
Found 1 error in 1 file (checked 25 source files)

and is indeed correct. Have to dig in why we do not see this in case of unix_console.py ...

[chris-eibl]

Full in sync with unix_console.py now :)

cpython/Lib/_pyrepl/unix_console.py

Lines 419 to 427 in e1c09ff

	def wait(self, timeout: float | None = None) -> bool:
	"""
	Wait for events on the console.
	"""
	return (
	not self.event_queue.empty()
	or self.more_in_buffer()
	or bool(self.pollob.poll(timeout))
	)