Fix 'Empty lines between lines with block tags' parser test

This fixes test cases like this (added to parserTests in
6716ee49b1a337e1a9e302a25e4b8c5988397c31):

<div>a</div>b

<div>b</div>d

<div>e</div>

Change-Id: Ieb7f16753ddb13465cd7c1e30a4e03920f99aba9