gh-136087: Remove `\r` from documented `os.linesep` values

[sobolevn]

• Issue: gh-136087

[collinfunk]

Hi, I looked into this a bit.

The value \r used to exist when the variable was added in https://github.com/python/cpython/commit/e9387ea773cdffeac5aa8ca094471bfc38ff6d03.

It was removed in https://github.com/python/cpython/commit/eca20b611433fac88057da092efc0b6d6d2a7fb3. It was a merge from subversion, but I am 99% percent confident it was a part of this change:

      r63158 | ronald.oussoren | 2008-05-12 07:24:33 -0400 (Mon, 12 May 2008) | 5 lines
    
      Remove references to platform 'mac'
    
      The 'mac' platform (that is, os.name == 'mac') was used for the MacOS 9 port,
      which is no longer supported (as of Python 2.4 IIRC).

Wikipedia states that \r was used in Classic Mac OS to represent a newline [1]. The page for Classic Mac OS says Mac OS 9 was the last version. This matches with the subversion commit message.

Therefore, your patch is correct. Good catch!

[1] https://en.wikipedia.org/wiki/Newline#Representation [2] https://en.wikipedia.org/wiki/Classic_Mac_OS

[miss-islington-app[bot]]

Thanks @sobolevn for the PR 🌮🎉.. I'm working now to backport this PR to: 3.13, 3.14. 🐍🍒⛏🤖 I'm not a witch! I'm not a witch!

[bedevere-app[bot]]

GH-136111 is a backport of this pull request to the 3.14 branch.

[bedevere-app[bot]]

GH-136112 is a backport of this pull request to the 3.13 branch.