Index: TipAndDoc/.gitconfig
===================================================================
--- TipAndDoc/.gitconfig	(revision 072e48b7da32571b78f33602b721c2a4692916a2)
+++ TipAndDoc/.gitconfig	(revision 86521dd57eee3bddd494b133f38d50d39f81b880)
@@ -6,4 +6,5 @@
 [alias]
 	br = branch
+	ca = diff --cache
 	ci = commit
 	co = checkout