Re: git-bisect feature suggestion: "git-bisect diff"

>  (1) When no option is given, and $DISPLAY is set, it continues to
>      spawn gitk as before;
> 
>  (2) When no option is given, and $DISPLAY is unset, "git log" is run
>      to show the range of commits between the bad one and the good 
>      ones;
> 
>  (3) If only "-flag" options are given, "git log <options>" is run.
>      E.g. "git bisect visualize --stat"
> 
>  (4) Otherwise, all of the given options are taken as the initial part
>      of the command line and the commit range expression is given to 
>      that command.  E.g. "git bisect visualize tig" will run "tig" 
>      history viewer to show between the bad one and the good ones.