tests/test-convert-hg-sink.out

prepush: add more precise error messages

Part of the patch is from [e-mail]

- indicate the branch name where there are multiple heads
- give better advice when hitting a possible race, where new heads are added
  between discovery and the call to branchmap(). In that case, asking the user
  to merge isn't helpful, since only remote has the changes.

changeset:   3:593cbf6fb2b4
tag:         tip
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     Added tag some-tag for changeset ad681a868e44

changeset:   2:ad681a868e44
tag:         some-tag
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     add foo/file

changeset:   1:cbba8ecc03b7
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     remove foo

changeset:   0:327daa9251fa
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     add foo and bar

initializing destination new repository
scanning source...
sorting...
converting...
3 add foo and bar
2 remove foo
1 add foo/file
0 Added tag some-tag for changeset ad681a868e44
comparing with ../orig
searching for changes
no changes found
% dirstate should be empty:
3 files updated, 0 files merged, 0 files removed, 0 files unresolved
% put something in the dirstate:
a   0         -1 unset               baz
copy: bar -> baz
% add a new revision in the original repo
scanning source...
sorting...
converting...
0 add baz
comparing with ../orig
searching for changes
no changes found
% dirstate should be the same (no output below):
% no copies
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
baz not renamed
% test tag rewriting
initializing destination new-filemap repository
scanning source...
sorting...
converting...
4 add foo and bar
3 remove foo
2 add foo/file
1 Added tag some-tag for changeset ad681a868e44
0 add baz
tip                                2:6f4fd1df87fb
some-tag                           0:ba8636729451