coq	code	Require Import String.
coq	comment	(* comment *)
coq	code	Check "multiline
coq	code	string"%string.
coq	blank	
coq	comment	(* multiline
coq	comment	   comment *)
coq	blank	
coq	comment	(* recursion in (* a
coq	comment	   comment *) to complicate things *)
