cue: implementation of marked defaults

Change-Id: I7b0ed2b1e372a71410cbd05253ca819f08509a2a
diff --git a/doc/tutorial/basics/defaults.md b/doc/tutorial/basics/defaults.md
index a46825d..c65cb67 100644
--- a/doc/tutorial/basics/defaults.md
+++ b/doc/tutorial/basics/defaults.md
@@ -19,11 +19,11 @@
 <!-- CUE editor -->
 ```
 // any positive number, 1 is the default
-replicas: 1 | uint
+replicas: uint | *1
 
 // the default value is ambiguous
-protocol: "tcp" | "udp"
-protocol: "udp" | "tcp"
+protocol: *"tcp" | "udp"
+protocol: *"udp" | "tcp"
 ```
 
 <!-- result -->