Update ch20-01-single-threaded.md#3394

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chriskrycho merged 2 commits intorust-lang:mainfrom

MarijnRitzen:patch-3

Apr 17, 2024

Commits on Oct 20, 2022

Update ch20-01-single-threaded.md
MarijnRitzen
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Commits on Apr 17, 2024

Ch. 20: shorter version of corrected listing
chriskrycho
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