Resolve VIRTUAL_ENV with double-quotes

[ScumbagScalawag]

Without double-quotes, paths with spaces are not resolved correctly and venv name is not displayed correctly.

Before:

└─▪ echo $VIRTUAL_ENV
~/Documents/Path with spaces/env
basename: extra operand ‘spaces/env’
Try 'basename --help' for more information.
┌─()[name][os][±][( main ?:3 ⊘ )][~<Path redacted>]

But with this small change:

┌─(env)[name][os][±][( main ?:3 ⊘ )][~<Path redacted>]
└─▪

Edit: I'm not super familiar with Bash, but I'd recommend a quick once-over to make sure this issue doesn't appear in other places for zork. I only really discoverd this because of novice-level Bash knowledge and ChatGPT xd.

[akinomyoga]

I've applied the same change to the theme mairan and merged the PR. Thanks!