Documentation / diff-heuristic-options.txton commit t9813: avoid using pipes (c6f44e1)
   1--indent-heuristic::
   2--no-indent-heuristic::
   3--compaction-heuristic::
   4--no-compaction-heuristic::
   5        These are to help debugging and tuning experimental heuristics
   6        (which are off by default) that shift diff hunk boundaries to
   7        make patches easier to read.