使用 jade 写 html 的一个新手问题

source:

<p>
    <a href="#">test</a>&nbsp;
</p>

my solution:

p
	a(href='#') test
	!{'&nbsp'}
	

but there is Warning: missing space before text for line 66 of jade file "/home/gujunmin/Learn/forms-authentication/views/index.jade"，我该怎么办? 谢谢 O(∩_∩)O