http.client.HTTPConnection and HTTPResponse are missing __repr__

http.client.HTTPConnection and HTTPResponse lack repr implementations, producing the default unhelpful object repr:

>>> import http.client
>>> http.client.HTTPConnection('example.com')
<http.client.HTTPConnection object at 0x...>

These should show useful state at a glance:

>>> http.client.HTTPConnection('example.com')
<HTTPConnection example.com:80>
>>> http.client.HTTPSConnection('example.com')
<HTTPSConnection example.com:443>

And for responses:

>>> r = conn.getresponse()
>>> r
<HTTPResponse [200 OK]>

The module already has a repr on IncompleteRead, so there's precedent. This would help when debugging HTTP code in the REPL or debugger.

Linked PRs

• gh-145653

从 http.client 模块开始，并检查现有的 IncompleteRead repr 以作为参考。为 HTTPConnection、HTTPSConnection 和 HTTPResponse 添加与示例一致的实用表示，然后在相关测试中验证连接和响应的输出；关联的 PR gh-145653 表明这项工作已经在进行中。