plt/racket — pull request #63 by danking (2011-12-08 21:34:31+00:00)
Title: Enhance `stream-map' to work with more than one list

Stream map should work on multiple lists. From the tests:

```
(define fibonacci
(stream-cons 0 (stream-cons 1 (stream-map +
fibonacci
(stream-rest fibonacci)))))
```