[PATCH v5] shell: exchange Dijkstra $(( )) evaluator..

[Steffen Nurpmeso]

(P.S.: not tested with hush, actually.)

--steffen
|
|Der Kragenbaer,                The moon bear,
|der holt sich munter           he cheerfully and one by one
|einen nach dem anderen runter  wa.ks himself off
|(By Robert Gernhardt)