It makes the html easier to read compared to having a bunch of html entities. It also allows your source code to be wrapped to the next line ... ... <看更多>

... specifying white-space: normal on makes whitespace collapes ... on this is conformant to what is said in CSS Text spec and HTML spec, ... ... <看更多>

White-space property in CSS defines how white space should be treated in your HTML. There are several ... ... <看更多>

You can use CSS to remove it. Before and After. Just inserted body, html { border: 0; height: 100%; margin: 0; padding: 0; width: 100%; }. into the CSS. ... <看更多>