Documentation / technical / api-xdiff-interface.txton commit ref-filter: add --no-contains option to tag/branch/for-each-ref (ac3f5a3)
   1xdiff interface API
   2===================
   3
   4Talk about our calling convention to xdiff library, including
   5xdiff_emit_consume_fn.
   6
   7(Dscho, JC)