util: avoid using hashlib on Python < 2.5 (issue2278) The following patch allows the use of python2.4 with a standalone hashlib rather than assuming that python2.5 is in use when hashlib is imported successfully.

#!/bin/sh
hg init
echo This is file a1 > a
hg add a
hg commit -m "commit #0" -d "1000000 0"
ls
echo This is file b1 > b
hg add b
hg commit -m "commit #1" -d "1000000 0"
hg co 0
# B should disappear
ls