[plt-dev] Release Announcement for v4.2.4

From: Jon Rafkind (rafkind at cs.utah.edu)
Date: Mon Jan 25 13:54:47 EST 2010

> * [Itzhik] New `infinite-generator'`sequence->generator'
>    `sequence->repeated-generator'?
>    
`scheme/generator' provides new convenience functions for repeating 
computed values.


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