Fix up tests for new branch message

tests/test-encoding.out

@@ -13,6 +13,7 b" abort: decoding near ' encoded: \xe9': 'ascii' codec can't decode byte 0xe9 in position 20: ordinal not in range(128)!"
 transaction abort!
 rollback completed
 % these should work
+marked working directory as branch �
 % ascii
 changeset:   5:db5520b4645f
 branch:      ?

tests/test-impexp-branch.out

@@ -1,3 +1,4 b''
+marked working directory as branch abranch
 applying patch from stdin
 applying patch from stdin
 applying patch from stdin

tests/test-newbranch.out

@@ -1,6 +1,9 b''
+marked working directory as branch foo
 foo
+marked working directory as branch bar
 % branch shadowing
 abort: a branch of the same name already exists (use --force to override)
+marked working directory as branch default
 0 files updated, 0 files merged, 0 files removed, 0 files unresolved
 foo
 0 files updated, 0 files merged, 0 files removed, 0 files unresolved
@@ -83,8 +86,10 b' 67ec16bde7f1575d523313b9bca000f6a6f12dca'
 % update with no arguments: tipmost revision of the current branch
 bf1bc2f45e83
 4909a3732169 (foo) tip
+marked working directory as branch foobar
 abort: branch foobar not found
 % fastforward merge
+marked working directory as branch ff
 adding ff
 0 files updated, 0 files merged, 1 files removed, 0 files unresolved
 1 files updated, 0 files merged, 0 files removed, 0 files unresolved