tests: unset environment variable P in test-revset2.t (issue6109)
The test tests/test-revset2.t fails the test case
"Test repo.anyrevs with customized revset overrides" (line 1609)
if the environment variable P is set. The test implicitly expects that the
environment, in which it is started, does not export the variable 'P'.
To solve this issue, unset 'P' right before the test commands are run.
Differential Revision: https://phab.mercurial-scm.org/D6195
running: init test1
result: 0
running: add foo
result: 0
running: commit -m commit1 -d 2000-01-01 foo
result: 0
running: commit -m commit2 -d 2000-01-02 foo
result: 0
running: log -r 0
changeset: 0:0e4634943879
user: test
date: Sat Jan 01 00:00:00 2000 +0000
summary: commit1
result: 0
running: log -r tip
changeset: 1:45589e459b2e
tag: tip
user: test
date: Sun Jan 02 00:00:00 2000 +0000
summary: commit2
result: 0