view tests/test-rollback @ 4416:bb1800a7d7e1

merge: fix spurious merges for copies in linear updates

We make better use of contexts to accurately identify copies that
don't need merges.

Add a simple test and update other tests.

#!/bin/sh

mkdir t
cd t
hg init
echo a > a
hg add a
hg commit -m "test" -d "1000000 0"
hg verify
hg parents
hg status
hg rollback
hg verify
hg parents
hg status