Pipenv Shell raises error if shell's path contains space

[gtalarico]

This might be a windows only issue - Pipenv version 11.10.1
I am using cmder console

Steps to replicate

1. `set PIPENV_SHELL="c:\path_with space\enclosed\inquotes\shell"
2. pipenv shell

Expected result

Pipenv Shell is activated with the desired shell

Actual result

Pipenv Shell is activated with the default shell (cmd.exe)

'c:\path_with' is not regognized as an internal or external command

I use a portable cmder that is in a folder location that has spaces in its path.
To use Pipenv with cmder, I need to set PIPENV_SHELL to cmder's init.bat file
This files if there is a space in the folder path.

Work Around

Moving cmder's init.bat to a location with no spaces fixes it

[uranusjr]

Probably needs to quote it here. https://github.com/pypa/pipenv/blob/master/pipenv/core.py#L2179

[uranusjr]

I don’t think the above quote works. Didn’t actually check, but it seems on Windows it should go through the pew workon code path. I need to write a few unit tests to get this right…