p {white-space: pre-line;}<p>This paragraph has a great many s p a c e s with
its textual content, but their collapse will not prevent
line wrapping or line breaking.</p>
<p>注释：当 white-space 属性设置为 pre-line 时，浏览器会保留换行符，并允许自动换行，但是会合并空白符，这是与 pre-wrap 值的不同之处。</p>