Documentation: git-ls-files asciidocco.

Noticed by Jon Nelson.

Signed-off-by: Junio C Hamano <junkio@cox.net>
diff --git a/Documentation/git-ls-files.txt b/Documentation/git-ls-files.txt
index e433407..fe53412 100644
--- a/Documentation/git-ls-files.txt
+++ b/Documentation/git-ls-files.txt
@@ -80,7 +80,7 @@
 	R::	removed/deleted
 	C::	modified/changed
 	K::	to be killed
-	?	other
+	?::	other
 
 --full-name::
 	When run from a subdirectory, the command usually