tests/test-bisect.out

Prevent type exception on concatenation if diffstat returns None.

This will most often occur if diffstat is not installed in the
target platform, though may also happen in other cases where
diffstat fails to execute.

Signed-off-by: Sean Dague <[e-mail]>

% init
% committing changes
adding a
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% log
changeset:   31:58c80a7c8a40
tag:         tip
user:        test
date:        Thu Jan 01 00:00:31 1970 +0000
summary:     msg 31

changeset:   30:ed2d2f24b11c
user:        test
date:        Thu Jan 01 00:00:30 1970 +0000
summary:     msg 30

changeset:   29:b5bd63375ab9
user:        test
date:        Thu Jan 01 00:00:29 1970 +0000
summary:     msg 29

changeset:   28:8e0c2264c8af
user:        test
date:        Thu Jan 01 00:00:28 1970 +0000
summary:     msg 28

changeset:   27:288867a866e9
user:        test
date:        Thu Jan 01 00:00:27 1970 +0000
summary:     msg 27

changeset:   26:3efc6fd51aeb
user:        test
date:        Thu Jan 01 00:00:26 1970 +0000
summary:     msg 26

changeset:   25:02a84173a97a
user:        test
date:        Thu Jan 01 00:00:25 1970 +0000
summary:     msg 25

changeset:   24:10e0acd3809e
user:        test
date:        Thu Jan 01 00:00:24 1970 +0000
summary:     msg 24

changeset:   23:5ec79163bff4
user:        test
date:        Thu Jan 01 00:00:23 1970 +0000
summary:     msg 23

changeset:   22:06c7993750ce
user:        test
date:        Thu Jan 01 00:00:22 1970 +0000
summary:     msg 22

changeset:   21:e5db6aa3fe2a
user:        test
date:        Thu Jan 01 00:00:21 1970 +0000
summary:     msg 21

changeset:   20:7128fb4fdbc9
user:        test
date:        Thu Jan 01 00:00:20 1970 +0000
summary:     msg 20

changeset:   19:52798545b482
user:        test
date:        Thu Jan 01 00:00:19 1970 +0000
summary:     msg 19

changeset:   18:86977a90077e
user:        test
date:        Thu Jan 01 00:00:18 1970 +0000
summary:     msg 18

changeset:   17:03515f4a9080
user:        test
date:        Thu Jan 01 00:00:17 1970 +0000
summary:     msg 17

changeset:   16:a2e6ea4973e9
user:        test
date:        Thu Jan 01 00:00:16 1970 +0000
summary:     msg 16

changeset:   15:e7fa0811edb0
user:        test
date:        Thu Jan 01 00:00:15 1970 +0000
summary:     msg 15

changeset:   14:ce8f0998e922
user:        test
date:        Thu Jan 01 00:00:14 1970 +0000
summary:     msg 14

changeset:   13:9d7d07bc967c
user:        test
date:        Thu Jan 01 00:00:13 1970 +0000
summary:     msg 13

changeset:   12:1941b52820a5
user:        test
date:        Thu Jan 01 00:00:12 1970 +0000
summary:     msg 12

changeset:   11:7b4cd9578619
user:        test
date:        Thu Jan 01 00:00:11 1970 +0000
summary:     msg 11

changeset:   10:7c5eff49a6b6
user:        test
date:        Thu Jan 01 00:00:10 1970 +0000
summary:     msg 10

changeset:   9:eb44510ef29a
user:        test
date:        Thu Jan 01 00:00:09 1970 +0000
summary:     msg 9

changeset:   8:453eb4dba229
user:        test
date:        Thu Jan 01 00:00:08 1970 +0000
summary:     msg 8

changeset:   7:03750880c6b5
user:        test
date:        Thu Jan 01 00:00:07 1970 +0000
summary:     msg 7

changeset:   6:a3d5c6fdf0d3
user:        test
date:        Thu Jan 01 00:00:06 1970 +0000
summary:     msg 6

changeset:   5:7874a09ea728
user:        test
date:        Thu Jan 01 00:00:05 1970 +0000
summary:     msg 5

changeset:   4:9b2ba8336a65
user:        test
date:        Thu Jan 01 00:00:04 1970 +0000
summary:     msg 4

changeset:   3:b53bea5e2fcb
user:        test
date:        Thu Jan 01 00:00:03 1970 +0000
summary:     msg 3

changeset:   2:db07c04beaca
user:        test
date:        Thu Jan 01 00:00:02 1970 +0000
summary:     msg 2

changeset:   1:5cd978ea5149
user:        test
date:        Thu Jan 01 00:00:01 1970 +0000
summary:     msg 1

changeset:   0:b99c7b9c8e11
user:        test
date:        Thu Jan 01 00:00:00 1970 +0000
summary:     msg 0

% hg up -C
0 files updated, 0 files merged, 0 files removed, 0 files unresolved
% bisect test
Testing changeset 16:a2e6ea4973e9 (30 changesets remaining, ~4 tests)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
Testing changeset 23:5ec79163bff4 (15 changesets remaining, ~3 tests)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
Testing changeset 27:288867a866e9 (8 changesets remaining, ~3 tests)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
Testing changeset 29:b5bd63375ab9 (4 changesets remaining, ~2 tests)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
Testing changeset 28:8e0c2264c8af (2 changesets remaining, ~1 tests)
1 files updated, 0 files merged, 0 files removed, 0 files unresolved
The first bad revision is:
changeset:   29:b5bd63375ab9
user:        test
date:        Thu Jan 01 00:00:29 1970 +0000
summary:     msg 29