do not write null sha1s to on-disk index

diff --git a/Documentation/git-difftool.txt b/Documentation/git-difftool.txt
index a03515f1eccddded2efbd46ca522f3bac8896d90..19d473c070c4f82dc4b7f04f784bcae835dca6a2 100644 (file)
--- a/Documentation/git-difftool.txt
+++ b/Documentation/git-difftool.txt
@@ -31,7 +31,7 @@ OPTIONS
 -t <tool>::
 --tool=<tool>::
        Use the diff tool specified by <tool>.
-       Valid merge tools are:
+       Valid diff tools are:
        araxis, bc3, diffuse, emerge, ecmerge, gvimdiff, kdiff3,
        kompare, meld, opendiff, p4merge, tkdiff, vimdiff and xxdiff.
 +