doc/tutorial/basics: add per-page chapter headings
Change-Id: I9e0a6b5d1a1c820081b3f87c3871068ea042f889
diff --git a/doc/tutorial/basics/defaults.md b/doc/tutorial/basics/defaults.md
index 145057e..642e621 100644
--- a/doc/tutorial/basics/defaults.md
+++ b/doc/tutorial/basics/defaults.md
@@ -1,3 +1,7 @@
+[TOC](Readme.md) [Prev](disjunctions.md) [Next](disjstruct.md)
+
+_Types and Values_
+
# Default Values
If at the time of evaluation a sum type still has more than one possible
@@ -15,7 +19,7 @@
<!-- CUE editor -->
```
// any positive number, 1 is the default
-replicas: 1 | uint
+replicas: 1 | uint
// the default value is ambiguous
protocol: "tcp" | "udp"
@@ -25,6 +29,5 @@
<!-- result -->
```
replicas: 1
-
protocol: _|_
```
\ No newline at end of file
