Documentation / technical / api-xdiff-interface.txton commit setup_reflog_action: document the rules for using GIT_REFLOG_ACTION (c3e2d18)
   1xdiff interface API
   2===================
   3
   4Talk about our calling convention to xdiff library, including
   5xdiff_emit_consume_fn.
   6
   7(Dscho, JC)