[Bug 1931296] [NEW] docs inconsistency in CVE-2021-29921

[KevinChan]

Public bug reported:

Hi
I notice some doc inconsistency in checking security update for CVE-2021-29921 on both 3.8.5-1~20.04.3 and 3.8.6-1ubuntu0.3 .

here says "Leading zeros are tolerated" in Doc/library/ipaddress.rst but actually this
usage is being banned in parsing. This inconsistency may lead to some confuse. Can this
be fixed in next release?

```
   .. versionchanged:: 3.8

      Leading zeros are tolerated, even in ambiguous cases that look like
      octal notation.
```

https://launchpadlibrarian.net/540767032/python3.8_3.8.5-1~20.04.2_3.8.5-1~20.04.3.diff.gz
https://bugs.python.org/issue36384

best regards
kevin

** Affects: python3.8 (Ubuntu)
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1931296

Title:
  docs inconsistency in CVE-2021-29921

Status in python3.8 package in Ubuntu:
  New

Bug description:
  Hi
  I notice some doc inconsistency in checking security update for CVE-2021-29921 on both 3.8.5-1~20.04.3 and 3.8.6-1ubuntu0.3 .

  here says "Leading zeros are tolerated" in Doc/library/ipaddress.rst but actually this
  usage is being banned in parsing. This inconsistency may lead to some confuse. Can this
  be fixed in next release?

  ```
     .. versionchanged:: 3.8

        Leading zeros are tolerated, even in ambiguous cases that look like
        octal notation.
  ```

  https://launchpadlibrarian.net/540767032/python3.8_3.8.5-1~20.04.2_3.8.5-1~20.04.3.diff.gz
  https://bugs.python.org/issue36384

  best regards
  kevin

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