chromium/third_party/blink/web_tests/editing/pasteboard/5521237.html

<p>This tests for a bug when pasting a word copied from TextEdit after a regular, breaking space.</p>
<div contenteditable="true" id="div">Everything n this editable region should be in one paragraph.</div>

<script>
if (window.testRunner)
    testRunner.dumpAsText();
    
div = document.getElementById("div");
text = div.firstChild;
sel = window.getSelection();

sel.collapse(text, 11);
document.execCommand("InsertHTML", false, "<div>i</div>")
</script>