t / t4101 / diff.2-3on commit rev-list: pass "int flags" as last argument of "show_bisect_vars" (37c4c38)
   1--- a/frotz
   2+++ b/frotz
   3@@ -1,2 +1,3 @@
   4 a
   5+c
   6 b
   7\ No newline at end of file