Align conda env name

[shelfofclub]

Could you align conda env name with the second line prompt?

I think this may be like "virtualenv could be integrated a little more nicely“ in #1.

The environment name seems to be added by conda. There are two environment variables set by conda. When a conda env is activated, CONDA_DEFAULT_ENV and CONDA_PROMPT_MODIFIER are set. For examples,

CONDA_DEFAULT_ENV=base
CONDA_PROMPT_MODIFIER=(base)

When conda env not activated, these env variables don't exit.
However, as for #2 , virtualenv may use different enc variables.

And changeps1: False in conda config file can prevent conda change prompt.

Thank you!

[dannynimmo]

Fixed in #6