Updates README sample code, and a couple of typos. #181

Job	Run time
Formatting Check	1m 17s
Cabal Check	1m 17s
Build and Test (pg12, stack-lts-18.28-ghc-8.10.7.yml)	9m 53s
Build and Test (pg12, stack-lts-19.33-ghc-9.0.2.yml)	9m 17s
Build and Test (pg12, stack-lts-20.26-ghc-9.2.8.yml)	11m 49s
Build and Test (pg12, stack-nightly-2023-10-01-ghc-9.6.3.yml)	8m 10s
Build and Test (pg12, stack.yml)	8m 35s
Build and Test (pg13, stack-lts-18.28-ghc-8.10.7.yml)	9m 14s
Build and Test (pg13, stack-lts-19.33-ghc-9.0.2.yml)	7m 59s
Build and Test (pg13, stack-lts-20.26-ghc-9.2.8.yml)	11m 42s
Build and Test (pg13, stack-nightly-2023-10-01-ghc-9.6.3.yml)	7m 55s
Build and Test (pg13, stack.yml)	10m 59s
Build and Test (pg14, stack-lts-18.28-ghc-8.10.7.yml)	8m 46s
Build and Test (pg14, stack-lts-19.33-ghc-9.0.2.yml)	8m 34s
Build and Test (pg14, stack-lts-20.26-ghc-9.2.8.yml)	9m 8s
Build and Test (pg14, stack-nightly-2023-10-01-ghc-9.6.3.yml)	8m 31s
Build and Test (pg14, stack.yml)	7m 53s
Build and Test (pg15, stack-lts-18.28-ghc-8.10.7.yml)	8m 23s
Build and Test (pg15, stack-lts-19.33-ghc-9.0.2.yml)	8m 54s
Build and Test (pg15, stack-lts-20.26-ghc-9.2.8.yml)	9m 45s
Build and Test (pg15, stack-nightly-2023-10-01-ghc-9.6.3.yml)	9m 42s
Build and Test (pg15, stack.yml)	6m 35s
Build and Test (pg16, stack-lts-18.28-ghc-8.10.7.yml)	7m 48s
Build and Test (pg16, stack-lts-19.33-ghc-9.0.2.yml)	7m 57s
Build and Test (pg16, stack-lts-20.26-ghc-9.2.8.yml)	9m 45s
Build and Test (pg16, stack-nightly-2023-10-01-ghc-9.6.3.yml)	6m 24s
Build and Test (pg16, stack.yml)	7m 37s
	3h 43m 49s

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