Just pre:

blank line follows

  this line has leading, embedded,   and trailing space  
 
previous line has one space
	this line has leading and	embedded tabs

Firefox: correct display; successful copy

Chrome: correct display; successful copy

With ordered list/pre:

  1. blank line follows
    3. 
            
  3.   this line has leading, embedded,   and trailing space  
    4. 
            
  4.  
    5. 
            
  5. previous line has one space
    6. 
            
  6. 	this line has leading and	embedded tabs
    7. 
        



Firefox: weird display; weird indent in copy, extra newlines,
  but whitespace preserved


Chrome: extra vertical space in display; blank line lost in copy



With ordered list/code:

        
    
            
  1. blank line follows
    2. 
            
    3. 
            
  3.   this line has leading, embedded,   and trailing space  
    4. 
            
  4.  
    5. 
            
  5. previous line has one space
    6. 
            
  6. 	this line has leading and	embedded tabs
    7. 
        



Firefox: weird indent in copy, all interesting whitespace lost


Chrome: whitespace lost in display, only embedded tab preserved in copy