==================
No group
==================

USER foo
USER FooBar
USER Foo-Bar

---

(source_file
	(user_instruction
		user: (unquoted_string))
	(user_instruction
		user: (unquoted_string))
	(user_instruction
		user: (unquoted_string)))

==================
With group
==================

USER foo:bar
USER foo:Bar
USER foo:Bar-Bar

---

(source_file
	(user_instruction
		user: (unquoted_string)
		group: (unquoted_string))
	(user_instruction
		user: (unquoted_string)
		group: (unquoted_string))
	(user_instruction
		user: (unquoted_string)
		group: (unquoted_string)))

==================
Numerical
==================

USER 1004:1004

---

(source_file
	(user_instruction
		user: (unquoted_string)
		group: (unquoted_string)))

===========================
No spaces in user:group
===========================

USER a: b

---

(source_file
  (ERROR
    (unquoted_string)))