Documentation / technical / api-xdiff-interface.txton commit t/t1100-commit-tree-options.sh: use the $( ... ) construct for command substitution (cbda02f)
   1xdiff interface API
   2===================
   3
   4Talk about our calling convention to xdiff library, including
   5xdiff_emit_consume_fn.
   6
   7(Dscho, JC)