abcde
abcde
abcde
a b c d e f g h i j

Please try document.getElementById("box").style.whiteSpace="pre" with the console.
Or edit CSS directly via DevTools (F12), by adding white-space: pre; to #box.
Vertical scrollbar does not appear in Chrome 70.

* See also: tc.html Chrome bug 9

* This page is related to Issue 904049.