diff --git a/doc/tutorial/basics/disjunctions.md b/doc/tutorial/basics/disjunctions.md
index 6831dba..f9507ce 100644
--- a/doc/tutorial/basics/disjunctions.md
+++ b/doc/tutorial/basics/disjunctions.md
@@ -1,4 +1,4 @@
-[TOC](Readme.md) [Prev](unification.md) [Next](disjstruct.md)
+[TOC](Readme.md) [Prev](unification.md) [Next](defaults.md)
 
 _Types and Values_
 
diff --git a/doc/tutorial/basics/fold.md b/doc/tutorial/basics/fold.md
index 4e8fa8e..952c240 100644
--- a/doc/tutorial/basics/fold.md
+++ b/doc/tutorial/basics/fold.md
@@ -13,9 +13,11 @@
 
 <!-- JSON result -->
 ```json
-"outer": {
-    "middle": {
-        "inner": 3
+{
+    "outer": {
+        "middle": {
+            "inner": 3
+        }
     }
 }
 ```
\ No newline at end of file
diff --git a/doc/tutorial/basics/foldany.md b/doc/tutorial/basics/foldany.md
index dd77606..1bcab41 100644
--- a/doc/tutorial/basics/foldany.md
+++ b/doc/tutorial/basics/foldany.md
@@ -17,12 +17,14 @@
 
 <!-- JSON result -->
 ```json
-"outer": {
-    "middle1": {
-        "inner": 3
-    },
-    "middle2": {
-        "inner": 7
+{
+    "outer": {
+        "middle1": {
+            "inner": 3
+        },
+        "middle2": {
+            "inner": 7
+        }
     }
 }
 ```
\ No newline at end of file