title: About the space and line-break in HTML source code
body: <p>Sometimes, the space and line-break between two HTML tag will ignored by the browser, sometimes not. </p>
  
  <p>I feel that space and line-break between two line box show, two block box don't show.but how about one line box and one block box?</p>
  
  <p>I want the rule or specification, could you tell me?</p>