Fix 3-way-merge of original parent, workdir and new parent.
The dirstate has to match what is in the repository (what would be
checked out with 'hg update -C'), because the resulting file may be
identical to the new parent, or it may be completely different.
Previously the dirstate wasn't updated, so if you changed the file to
look like the original parent, it might be considered unmodified
relative to the new parent.
+ hg init
+ hg add foo bar
+ hg commit -m commit text -d 0 0
+ hg clone A1 B1
+ hg remove bar
+ hg commit -m commit test -d 0 0
+ hg commit -m commit test -d 0 0
+ hg clone A1 A2
+ hg clone B1 B2
+ hg pull ../B1
pulling from ../B1
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 1 changes to 1 files
(run 'hg update' to get a working copy)
+ hg update -m
+ hg commit -m commit test -d 0 0
bar should remain deleted.
+ hg manifest
6b70e9e451a5a33faad7bbebe627e46b937b7364 644 foo
+ hg pull ../A2
pulling from ../A2
searching for changes
adding changesets
adding manifests
adding file changes
added 1 changesets with 0 changes to 0 files
(run 'hg update' to get a working copy)
+ hg update -m
+ hg commit -m commit test -d 0 0
bar should remain deleted.
+ hg manifest
6b70e9e451a5a33faad7bbebe627e46b937b7364 644 foo