parseDDString

	import std.stdio, std.string;

	auto text = `Ddoc
	This file is a $(unknown standalone) Ddoc file. It can contain any kind of
	$(MAC macros), defined in the $(MAC 'Macros:' section).

Macros:
	MAC=$0
	_=
`;

	auto expected1 = `This file is a  Ddoc file. It can contain any kind of
	macros, defined in the 'Macros:' section.`;
	auto expected2 = `This file is a $(unknown standalone) Ddoc file. It can contain any kind of
	macros, defined in the 'Macros:' section.`;

	auto lex = Lexer(text, true);
	// Whitespace and newline before / after not taken into account.
	auto res = parseDDString(text, null).strip;
	assert(res == expected1, res);
	res = parseDDString(text, null, false).strip;
	assert(res == expected2, res);