book: Fix final dining philosophers program output#30569

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danmactough wants to merge 3 commits intorust-lang:masterfrom

danmactough:fix-dining-philosophers

Commits on Dec 26, 2015

Fix final dining philospher output to match actual program output.
danmactough
committed

Commits on Dec 28, 2015

Revert "Fix final dining philospher output to match actual program output."
danmactough
committed
Clarify characterization of problem solution.
danmactough
committed