subprocess.Popen doesn't properly escape < or > for windows batch files

Bug report

Bug description:

subprocess.Popen doesn't properly escape < or > for windows batch files

example.bat

echo %*

example.py

import subprocess
from pathlib import Path

batch_file = Path().cwd() / 'example.bat'
subprocess.Popen([batch_file, 'arg1', 'arg2<99'])

Error

The system cannot find the file specified

Adding a space causes it to be correctly escaped:

subprocess.Popen([batch_file, 'arg1', 'arg2 <99'])

CPython versions tested on:

3.13

Operating systems tested on:

Windows

Linked PRs

• gh-134544

從 example.py 中回報的 subprocess.Popen 呼叫開始，使用引數 arg2<99 透過 example.bat 在 Windows 上重現它，然後將其與包含空格的引數進行比較。檢查連結的 PR gh-134544 以了解目前的工作狀態；無空格的情況能正確逸出且回歸測試已涵蓋即表示完成。