Add diff-option --ext-diff

diff --git a/Documentation/diff-options.txt b/Documentation/diff-options.txt
index 0f07c9c4a86df8ac2d7ab2f99e31226e395b63ab..3d2b9d0a06f38c42c0df927fa03a053fa1b45277 100644 (file)
--- a/Documentation/diff-options.txt
+++ b/Documentation/diff-options.txt
@@ -168,5 +168,13 @@
 --quiet::
        Disable all output of the program. Implies --exit-code.
 
+--ext-diff::
+       Allow an external diff helper to be executed. If you set an
+       external diff driver with gitlink:gitattributes(5), you need
+       to use this option with gitlink:git-log(1) and friends.
+
+--no-ext-diff::
+       Disallow external diff drivers.
+
 For more detailed explanation on these common options, see also
 link:diffcore.html[diffcore documentation].