* fix(pipenv): don't activate or leak errors when virtualenv is missing
* fix(pipenv): compare whole path components when deactivating
$PWD
$pipfile_dir is a string-prefix test, so moving from a project to an
unrelated sibling whose path merely starts with the same text (…/proj ->
…/proj-archive, …/projX) does not deactivate: the project's virtualenv
stays active in a directory that has no Pipfile. Require an exact match or
a component boundary instead. Subdirectories of the project keep their
current behaviour, and a project at / still matches everything.
asp() already writes its "profile not found" error to stderr and ends
with ${reset_color}; asr() printed its region error to stdout without a
reset, leaving the terminal red and mixing diagnostics into piped output.
Mirror asp() so both selection helpers behave the same.
Refs #13949