Mismatch behaviour in documentation of `email.Message.defects`

Documentation

https://docs.python.org/3/library/email.message.html#email.message.EmailMessage.defects

The defects attribute contains a list of all the problems found when parsing this message. See email.errors for a detailed description of the possible parsing defects.

It actually does not include defects in the message headers (#106144, #90169). Until these issues are fixed, the documentation should state that header defects are not included in email.Message.defects.

Linked PRs

• gh-128569

先从链接的 email.message.EmailMessage.defects 文档和所引用的 email.errors 页面开始，然后查看与标头缺陷相关的 issue。完成的标准是，文档准确说明消息标头中的缺陷在这些 issue 修复之前不会包含在 email.Message.defects 中。