t / t4110 / patch2.patchon commit tree-walk: store object_id in a separate member (ea82b2a)
   1diff --git a/new.txt b/new.txt
   2--- a/new.txt
   3+++ b/new.txt
   4@@ -1,7 +1,3 @@
   5-a1
   6-a11
   7-a111
   8-a1111
   9 b1
  10 b11
  11 b111