Documentation / technical / api-xdiff-interface.txton commit builtin-gc.c: allow disabling all auto-gc'ing by assigning 0 to gc.auto (b14d255)
   1xdiff interface API
   2===================
   3
   4Talk about our calling convention to xdiff library, including
   5xdiff_emit_consume_fn.
   6
   7(Dscho, JC)