Store empty (default) branch in branch cache, too.
Operations on this branch don't work otherwise.
Reading branches.cache had to be adjusted to allow an empty label.
Adjusted reading of the cache tip for symmetry, no functional change here.
not removing foo: file is not managed
abort: no files specified
undeleting foo
removing foo
# HG changeset patch
# User test
# Date 1000000 0
# Node ID 8ba83d44753d6259db5ce6524974dd1174e90f47
# Parent 0000000000000000000000000000000000000000
1
diff -r 000000000000 -r 8ba83d44753d foo
--- /dev/null
+++ b/foo
@@ -0,0 +1,1 @@
+a
# HG changeset patch
# User test
# Date 1000000 0
# Node ID a1fce69c50d97881c5c014ab23f580f720c78678
# Parent 8ba83d44753d6259db5ce6524974dd1174e90f47
2
diff -r 8ba83d44753d -r a1fce69c50d9 foo
--- a/foo
+++ /dev/null
@@ -1,1 +0,0 @@
-a
changeset: 0:8ba83d44753d
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: 1
diff -r 000000000000 -r 8ba83d44753d foo
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/foo Mon Jan 12 13:46:40 1970 +0000
@@ -0,0 +1,1 @@
+a
changeset: 1:a1fce69c50d9
tag: tip
user: test
date: Mon Jan 12 13:46:40 1970 +0000
summary: 2
diff -r 8ba83d44753d -r a1fce69c50d9 foo
--- a/foo Mon Jan 12 13:46:40 1970 +0000
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,1 +0,0 @@
-a
not removing a: file has been marked for add (use -f to force removal)
adding a
adding b
not removing b: file is modified (use -f to force removal)
2 files updated, 0 files merged, 0 files removed, 0 files unresolved