Fully dynamic d by opDotExp overloading

[Georg Wrede]

Walter Bright wrote:
> A simple command line spell checker would be a cool demonstration of this!

$ man bash
/cdspell

   If set, minor errors in the spelling of a directory com-
   ponent in a cd command will be  corrected.   The  errors
   checked for are transposed characters, a missing charac-
   ter, and one character too many.   If  a  correction  is
   found,  the corrected file name is printed, and the com-
   mand proceeds.  This option is only used by  interactive
   shells.