revrange: drop old-style parser in favor of revset (API)
Now revset can parse nullary ":" operator and existing "foo+bar" tags, we
don't need the old-style parser.
This means scmutil.revsingle(), revpair() and revrange() no longer accept
a binary nodeid. An integer revision is still allowed as it isn't ambiguous.
Test update logic when there are renames
Update with local changes across a file rename
$ hg init
$ echo a > a
$ hg add a
$ hg ci -m a
$ hg mv a b
$ hg ci -m rename
$ echo b > b
$ hg ci -m change
$ hg up -q 0
$ echo c > a
$ hg up
merging a and b to b
warning: conflicts during merge.
merging b incomplete! (edit conflicts, then use 'hg resolve --mark')
0 files updated, 0 files merged, 0 files removed, 1 files unresolved
use 'hg resolve' to retry unresolved file merges
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