t / t4110 / patch3.patchon commit xdl_change_compact(): only use heuristic if group can't be matched (cb0eded)
   1diff --git a/new.txt b/new.txt
   2--- a/new.txt
   3+++ b/new.txt
   4@@ -6,6 +6,10 @@
   5 b11
   6 b111
   7 b1111
   8+b2
   9+b22
  10+b222
  11+b2222
  12 c1
  13 c11
  14 c111