tests: replace imported module to avoid check-code.py error
This is a part of preparation to apply checking with check-code.py on
code fragments embedded in *.t test scripts.
--- a/tests/test-status.t Mon Feb 18 00:27:25 2019 +0900
+++ b/tests/test-status.t Mon Feb 18 00:27:25 2019 +0900
@@ -290,7 +290,7 @@
$ hg status -A -Tpickle > pickle
>>> from __future__ import print_function
- >>> import pickle
+ >>> from mercurial.util import pickle
>>> data = sorted((x[b'status'].decode(), x[b'path'].decode()) for x in pickle.load(open("pickle", r"rb")))
>>> for s, p in data: print("%s %s" % (s, p))
! deleted