Documentation/git-reset:

Since 3368d11f (Remove unnecessary git-rm --cached reference from
status output), the status output marks the "Added but not yet
committed" section as "Changes to be committed".
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

Documentation/git-reset.txt

@@ -37,7 +37,7 @@ OPTIONS
 --soft::
 	Does not touch the index file nor the working tree at all, but
 	requires them to be in a good order. This leaves all your changed
-	files "Added but not yet committed", as linkgit:git-status[1] would
+	files "Changes to be committed", as linkgit:git-status[1] would
 	put it.
 
 --hard::