anchor.diff:  entries, so that for example attempts to emit color sequences on VT100 terminals
   won't result in unintended consequences.
   
  -In Windows mode, _Tcell_ supports 16 colors, bold, dim, and reverse,
  +In legacy Windows mode, _Tcell_ supports 16 colors, bold, dim, and reverse,
   instead of just termbox's 8 colors with reverse.  (Note that there is some
   conflation with bold/dim and colors.)
  +Modern Windows 10 can benefit from much richer colors however.
   
   _Tcell_ maps 16 colors down to 8, for terminals that need it.
   (The upper 8 colors are just brighter versions of the lower 8.)
  
positive.code: _Tcell_ supports enhanced mouse tracking mode, so your application can receive
  regular mouse motion events, and wheel events, if your terminal supports it.
  
  ## _Termbox_ Compatibility
  
  A compatibility layer for _termbox_ is provided in the `compat` directory.
  To use it, try importing `github.com/gdamore/tcell/termbox`
  instead.  Most _termbox-go_ programs will probably work without further
  modification.
  
  ## Working With Unicode
  
  
negative.code: to work with all of the systems officially supported by golang with
  the exception of nacl (which lacks any kind of a terminal interface).
  (Plan9 is not supported by _Tcell_, but it is experimental status only
  in golang.)  _Tcell_ is pure Go, without any need for CGO.
  
  ## No Async IO
  
  