LayoutTests/editing/deleting/merge-unrendered-space.html

<script>
if (window.layoutTestController)
     layoutTestController.dumpEditingCallbacks();
</script>
<p>This tests deleting the line break before a paragraph that ends with unrendered space.</p>
<div id="test" contenteditable="true">foo<br>bar
<div>baz</div></div>

<script type="text/javascript" src="../editing.js"></script>
<script>
var s = window.getSelection();
var e = document.getElementById("test");

s.setPosition(e, 0);
moveSelectionForwardByLineCommand();
deleteCommand();
</script>