Minor fix to the demo export file.

dulwich/tests/data/repos/issue88_expect_ack_nak_client.export

@@ -47,7 +47,7 @@ commit refs/heads/master
 mark :7
 author User <user@localhost> 1427185245 +1300
 committer User <user@localhost> 1427185245 +1300
-data 23
+data 14
 replace a line
 from :5
 M 100644 :6 demo.txt

dulwich/tests/data/repos/issue88_expect_ack_nak_server.export

@@ -47,7 +47,7 @@ commit refs/heads/master
 mark :7
 author User <user@localhost> 1427185245 +1300
 committer User <user@localhost> 1427185245 +1300
-data 23
+data 14
 replace a line
 from :5
 M 100644 :6 demo.txt