Documentation / technical / api-xdiff-interface.txton commit t/t5000-tar-tree.sh: avoid "test <cond> -a/-o <cond>" (d0b30a3)
   1xdiff interface API
   2===================
   3
   4Talk about our calling convention to xdiff library, including
   5xdiff_emit_consume_fn.
   6
   7(Dscho, JC)