xdiff: implement empty line chunk heuristic

diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index 3ad6404dbcf2915721ac963085bbc0269c1d7312..b513023cd76f8505c254338c14bce84a234a7ac4 100644 (file)
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -63,6 +63,12 @@ ifndef::git-format-patch[]
        Synonym for `-p --raw`.
 endif::git-format-patch[]
 
+--compaction-heuristic::
+--no-compaction-heuristic::
+       These are to help debugging and tuning an experimental
+       heuristic that shifts the hunk boundary in an attempt to
+       make the resulting patch easier to read.
+
 --minimal::
        Spend extra time to make sure the smallest possible
        diff is produced.