oopsies in ExtremeProgrammingInstalled
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Chapter 3, 2nd page
"(page 79).  but frankly we need more."
should replace period with comma and add another comma.
"(page 79), but frankly, we need more."

Chapter 3, last paragraph
"34th street" - should capitalize "Street"
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pg 180: Fourth paragraph, second sentence, "But we're doing to do it again..." should be "But we're '''going''' to do it again..."
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See also: ExtremeProgrammingExplainedErrata