tests: explicitly request changed version in test-rebase-newancestor.t
We're going to change the default for this in an upcoming patch, but in this
instance we do want to continue picking the changed version.
$ hg init
$ echo This is file a1 > a
$ hg add a
$ hg commit -m "commit #0"
$ ls
a
$ echo This is file b1 > b
$ hg add b
$ hg commit -m "commit #1"
$ hg co 0
0 files updated, 0 files merged, 1 files removed, 0 files unresolved
B should disappear
$ ls
a