format-patch: do not let its diff-options affect --range-diff

diff --git a/Documentation/rev-list-options.txt b/Documentation/rev-list-options.txt
index 21978ebbacf838328e6e686c333f97a2bddf1d5a..bab5f50b1724913c7607180897b7f92d1517dda9 100644 (file)
--- a/Documentation/rev-list-options.txt
+++ b/Documentation/rev-list-options.txt
@@ -731,6 +731,11 @@ the requested refs.
 +
 The form '--filter=sparse:path=<path>' similarly uses a sparse-checkout
 specification contained in <path>.
++
+The form '--filter=tree:<depth>' omits all blobs and trees whose depth
+from the root tree is >= <depth> (minimum depth if an object is located
+at multiple depths in the commits traversed). Currently, only <depth>=0
+is supported, which omits all blobs and trees.
 
 --no-filter::
        Turn off any previous `--filter=` argument.