Matthias Felleisen 7514daa7b9 removed erase and clear from World & Canvas ... svn: r7070		2007-08-09 21:01:28 +00:00
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htdc	removed erase and clear from World & Canvas	2007-08-09 21:01:28 +00:00
htdp	docs revised for world	2007-08-07 00:02:07 +00:00
turtles.ss
value-turtles.ss