Updates checked-in line endings on several files.

This is a revertion of cfc66e37eb8e.

Thanks to 鄭景文 for the bug report. Thanks to Tin Tvrtković, Xiang
Zhang, and Dan McCombs for diagnosing the issue.

This will hopefully make maintenance of venv documentation easier.
For example, see commits a4f0d76af176 and 5764cc02244d.

This patch has been reviewed by Vinaj Sajip, the maintainer of
venv module.

Most of the docs has already been updated in c3c188a0325a.

Issue #18807: If copying (no symlinks) specified for a venv, then the python interpreter aliases (python, python3) are now created by copying rather than symlinking.

Closes #18807: pyvenv now takes a --copies argument allowing copies instead of symlinks even where symlinks are available and the default.

Issue #18224: Removed pydoc script from created venv, as it causes problems on Windows and adds no value over and above python -m pydoc ...

ModuleNotFoundError.