add toc

diff --git a/guide/challenge-bot.scm b/guide/challenge-bot.scm
index f019671a68c73d422c60b65040032595a5a8a6c0..6b94bf27b46cc8e9844f852278ea0bb47eab537f 100644 (file)
--- a/guide/challenge-bot.scm
+++ b/guide/challenge-bot.scm
@@ -3,6 +3,7 @@
 
 (document
  :title [challenge-bot]
+ (toc)
  (chapter
   :title [mechanical]
   (p [let's build your robot!])