added all available system variable

[Abdullium]

Just below the "Custom Virtual Environment Location" I have added all the system environment variable

Thank you for contributing to Pipenv!

The issue

What is the thing you want to fix? Is it associated with an issue on GitHub? Please mention it.

Always consider opening an issue first to describe your problem, so we can discuss what is the best way to amend it. Note that if you do not describe the goal of this change or link to a related issue, the maintainers may close the PR without further review.

If your pull request makes a non-insignificant change to Pipenv, such as the user interface or intended functionality, please file a PEEP.

https://github.com/pypa/pipenv/blob/master/peeps/PEEP-000.md

The fix

How does this pull request fix your problem? Did you consider any alternatives? Why is this the best solution, in your opinion?

The checklist

• Associated issue
• A news fragment in the news/ directory to describe this fix with the extension .bugfix, .feature, .behavior, .doc. .vendor. or .trivial (this will appear in the release changelog). Use semantic line breaks and name the file after the issue number or the PR #.

[oz123]

This approach requires manual labor to document the variables if they are removed or added.
Please see my branch here:
https://github.com/pypa/pipenv/tree/document-environment-variables

You can steal this code, and add the news fragment to finish my PR.

[Abdullium]

This approach requires manual labor to document the variables if they are removed or added. Please see my branch here: https://github.com/pypa/pipenv/tree/document-environment-variables

You can steal this code, and add the news fragment to finish my PR.

I've cleared the issue
can you merge the request now?

[oz123]

Not yet. You still need to change environments.py and create a news entry.

[Abdullium]

Not yet. You still need to change environments.py and create a news entry.

See what I suggest is that
You can merge the request now

And I will later raise the issue for any descrepancies

[oz123]

@Abdullium thank you for your contribution, I created a PR which fixes the issue #5235 .