add merge command. means same thing as "update -m".
repo.addchangegroup method now returns number of heads modified and added,
so command line can tell whether update or merge needed. this makes
tiny change to ssh wire protocol, but change is backwards compatible.
pull command now returns 0 if no changes to pull.
# HG changeset patch
# User test
# Node ID 8ba83d44753d6259db5ce6524974dd1174e90f47
# Parent 0000000000000000000000000000000000000000
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
# HG changeset patch
# User test
# Node ID a1fce69c50d97881c5c014ab23f580f720c78678
# Parent 8ba83d44753d6259db5ce6524974dd1174e90f47
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
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