===============================
Minimal
===============================
entity e is
end;

entity e is
end entity;

entity e is
end e;

entity e is
end entity e;
---

(design_file
  (design_unit
    (entity_declaration
      name: (identifier)))
  (design_unit
    (entity_declaration
      name: (identifier)))
  (design_unit
    (entity_declaration
      name: (identifier)
      at_end: (simple_name)))
  (design_unit
    (entity_declaration
      name: (identifier)
      at_end: (simple_name))))
