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Edit history of sicp-ex-4.54

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32013-03-10 19:15:39+2 -1 line(s)[View this version, source] [Diff to previous]
modified indentation—simple
22013-03-10 19:14:23+9 -0 line(s)[View this version, source] [Diff to current|previous]
Corrected "fail" to "(fail)"; the previous editor let the condition simply evaluate to fail2 rather than actually calling it.
12012-08-04 08:17:17+15 -0 line(s)[View this version, source] [Diff to current|previous]
add answer
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