make right arrow in dired act like lynx

[Dan Jacobson]

Gentlemen, after using lynx for several minutes and then using dired,
I found myself trying to use the lynx right arrow key to get into
files and subdirectories.  Hmmm.

If one were going to implement this in dired, it would appear to be a
simple set-key to make right arrow to do the same thing as RET does
now, dired-advertised-find-file.  Wait! I mean dired-view-file, the v
key.  Hmmm, and then one would also want to map left arrow to get back
from where we were .... ok, never mind.  Anyway, my point I suppose is
to show off how my brain is melting, thinking one program is another
after just a little time, silly me.
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