Explicitly add [#[elaborate]] attribute.

content/docs/class_reps/alt.v

@@ -13,6 +13,7 @@ NES.Begin Point.
 
 Consider the following AST `source`, definining C++ class `Point`.
 |*)
+#[elaborate]
 cpp.prog source prog cpp:{{
   class Point {
     int x;
@@ -97,6 +98,7 @@ To continue, we abort the proof, and define AST `source1` with a fixed version o
 |*)
     Abort.
 
+    #[elaborate]
     cpp.prog source1 prog cpp:{{
       class Point {
         int x{0};

content/docs/class_reps/main.v

@@ -23,6 +23,7 @@ Require Import skylabs.lang.cpp.parser.plugin.cpp2v.
 ## The Program
 
 Here, we define the AST `source` containing our example C++ program: |*)
+#[elaborate]
 cpp.prog source prog cpp:{{
   struct IntCell {
     int n{0};

content/docs/rep_hints/main.v

@@ -5,6 +5,7 @@ Require Import skylabs.lang.cpp.parser.plugin.cpp2v.
 
 (*| Define AST `source` containing our example C++ program.
 This is the same as in the [earlier tutorial](../../class_reps/main). |*)
+#[elaborate]
 cpp.prog source prog cpp:{{
   struct IntCell {
     int n{0};