One fence sequence over a node scope, and inline templates reject the folder sigils

data.go

@@ -62,19 +62,13 @@ func loadData(sources []dataSource) (map[string]node, error) {
 	if len(root) == 0 {
 		return nil, fmt.Errorf("no .json data found")
 	}
-	// The fences here and the scoped ones [Generator.NewTemplate] runs are one
-	// sequence split across two entry points; a new fence lands a twin below and
-	// in NewTemplate (see its comment for the one omission, checkNoCycles).
 	if err := linkRefs(root); err != nil {
 		return nil, err
 	}
 	if err := checkNoCycles(root); err != nil {
 		return nil, err
 	}
-	if err := checkRepeatReach(root); err != nil {
-		return nil, err
-	}
-	if err := checkBoundLevelsHeld(root); err != nil {
+	if err := checkScope(treeScope(root)); err != nil {
 		return nil, err
 	}
 	return root, nil