Thestd::str::Chars iterator has a niceDebug output:

fnmain(){letmut chars ="abc".chars();println!("{:?}", chars);    chars.next();println!("{:?}", chars);}

produces:

Chars(['a', 'b', 'c'])Chars(['b', 'c'])

It would be nice to seeunicode_segmentation::Graphemes and so forth implement a niceDebug output to display what they're going to be producing in the future.