Test unescapemarkup-004 PGh0bWw+CjxoZWFkPgo8dGl0bGU+QW4gSFRNTCBEb2N1bWVudDwvdGl0bGU+CjwvaGVhZD4KPGJv ZHk+CjxwPldpdGggPGVtPjxiPmJyb2tlbjwvZW0+PC9iPiBtYXJrdXAuCjwvYm9keT4KPC9odG1s Pgo= An HTML Document

With broken markup.