[plt-planet-announce] Updated PLaneT package: plai/plai.plt for 4.x

From: PLaneT (planet at plt-scheme.org)
Date: Tue Feb 9 18:07:47 EST 2010

This announces the availability of an updated package from PLaneT:

Name:            plai.plt
Package version: 1.17
Owner:           plai

Package Description
Language levels for the Programming Languages: Application and Interpretation textbook
Release Notes
Standardize error printing in type-case Memoizing contracts from datatypes

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