Slightly change the valid test input file

Fix lexer issue where consuming n tokens always fails if there are n
tokens and always succeeds if they aren't n tokens

src/ast.c

@@ -162,26 +162,46 @@ const char *ast_node_id_to_cstr(node_id_t id) {
     __builtin_unreachable();
 }
 
+/**
+ * @brief Helper function to print a single AST node with indentation
+ *
+ * @param node The node to print
+ * @param indent Current indentation level
+ */
 static void ast_node_print_internal(ast_node_t *node, int indent) {
     if (node == NULL) {
         return;
     }
 
+    // Print indentation
     for (int i = 0; i < indent; i++) {
         printf("  ");
     }
+
+    // Print node type
     printf("%s", ast_node_id_to_cstr(node->id));
 
+    // Print token value if available
     if (node->token_entry && node->token_entry->token.value) {
         printf(" \"%s\"", node->token_entry->token.value);
     }
     printf("\n");
 
+    // Recursively print all children with increased indentation
     for (size_t i = 0; i < node->len; i++) {
         ast_node_print_internal(node->children[i], indent + 1);
     }
 }
 
+/**
+ * @brief Prints an AST starting from the given node
+ *
+ * Prints a representation of the AST with indentation to show structure.
+ * Each node's type is shown, and if a node has an associated token value,
+ * that value is printed in quotes.
+ *
+ * @param node The root node of the AST to print
+ */
 void ast_node_print(ast_node_t *node) {
     ast_node_print_internal(node, 0);
 }

src/ast.h

@@ -106,15 +106,7 @@ void ast_node_free(ast_node_t *node);
  */
 error_t *ast_node_add_child(ast_node_t *node, ast_node_t *child);
 
-/**
- * @brief Prints an AST starting from the given node
- *
- * Prints a representation of the AST with indentation to show structure.
- * Each node's type is shown, and if a node has an associated token value,
- * that value is printed in quotes.
- *
- * @param node The root node of the AST to print
- */
+const char *ast_node_id_to_cstr(node_id_t id);
 void ast_node_print(ast_node_t *node);
 
 #endif // INCLUDE_SRC_AST_H_