Documentation / technical / api-xdiff-interface.txton commit travis-ci: use 'set -x' in 'ci/*' scripts for extra tracing output (4f26366)
   1xdiff interface API
   2===================
   3
   4Talk about our calling convention to xdiff library, including
   5xdiff_emit_consume_fn.
   6
   7(Dscho, JC)