git-diff-index.txt: make --cached description a proper sentence

Signed-off-by: Denton Liu <liu.denton@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

diff --git a/Documentation/git-diff-index.txt b/Documentation/git-diff-index.txt
index f4bd8155c0a707308162e050d5d59b5dbd5ca7a6..25fe165f0014b087e8b87177dd8573b29fa75782 100644 (file)
--- a/Documentation/git-diff-index.txt
+++ b/Documentation/git-diff-index.txt
@@ -27,7 +27,7 @@ include::diff-options.txt[]
        The id of a tree object to diff against.
 
 --cached::
-       do not consider the on-disk file at all
+       Do not consider the on-disk file at all.
 
 -m::
        By default, files recorded in the index but not checked