[racket] Vote for PLAI

A few minutes after my edit the editor started the discussion & votes.
See it here:

    https://en.wikipedia.org/wiki/Wikipedia:Articles_for_deletion/Programming_Languages:_Application_and_Interpretation

And please vote to keep the page.  To do that, hit the edit button and
add something like "* '''Keep''' blah blah blah".  (Using three single
quotes for bold.)

-- 
          ((lambda (x) (x x)) (lambda (x) (x x)))          Eli Barzilay:
                    http://barzilay.org/                   Maze is Life!