[Bugfix] Update VIRTUAL_ENV_DISABLE_PROMPT value

[josselinauguste]

Following a prezto update, the flag value of the VIRTUAL_ENV_DISABLE_PROMPT variable is now 12 (https://github.com/sorin-ionescu/prezto/blob/e9387a177e04b05dcf4f82e622615ddd32c558db/modules/python/init.zsh#L103).

[dritter]

Hi @josselinauguste , thanks for this PR. TBH, I don't know if this is right or not. The relevant commit in prezto is sorin-ionescu/prezto@ee885d4 and they reference this change in pure sindresorhus/pure@afa625b .

Why don't we just check if VIRTUAL_ENV_DISABLE_PROMPT is not empty? That would work with any value. On the downside this would disable the segment, even if the value would be set to false.. But to me it seems better than checking magic values..

[josselinauguste]

TBH, I don't know neither :-) The only thing I know is that the previous version didn't work, and this one does work.

I'm gonna try by checking if it's empty.

[josselinauguste]

It seems to work, the PR is updated!

[bhilburn]

Great recommendation, @dritter!

@josselinauguste - Thanks for putting together this PR and iterating on it with @dritter! This is a great first contribution to P9k - welcome to the project! =)