Wrong repr of delay expression assign to variable

[jcubic]

This is wrong:

lips> (delay 10)
#<promise - not forced>
lips> (define x (delay 10))
lips> x
#<procedure:x>

delay is a Scheme macro that creates a function (thunk) with extra logic and JS toString method.

lips> (procedure? (delay 10))
;; ==> #t   

But repr should be a promise. This is probably because __name__ is added to promise.

To fix this own property toString needs to be checked before __name__.