There is a XXX in v3.5.0 shows that need to dealing with deque maxlen setting case in deque_repeat.

Although there have common case for deque size 1 with maxlen, other size of deque with maxlen still using for-loop to extend the deque, without any detection.

Adding this fast break will reduce the execution speed when repeat deque with maxlen.

---
$ cat tests.py
from collections import deque
for _ in range(10:
    d = deque(maxlen=100_000)
    d.insert(0, 0)
    d.insert(0, 10)
    d * 10_000_000
$ time ./python_with_patch tests.py
$ time ./python tests.py