Improve README readability of some code snippets

14 jobs for master in 1 minute and 6 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  Check Workspace
failed #273690
linux-docker
build-std

00:00:41

failed #273691
linux-docker
build-wasm

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failed #273688
linux-docker
check-std

00:00:43

failed #273689
linux-docker
check-wasm

00:00:40

failed #273693
linux-docker
clippy-std

00:00:40

failed #273694
linux-docker
clippy-wasm

00:00:30

passed #273695
linux-docker
fmt

00:00:24

failed #273692
linux-docker
test-std

00:00:42

 
  Examples
skipped #273698
linux-docker
examples-clippy-std
skipped #273699
linux-docker
examples-clippy-wasm
skipped #273700
linux-docker
examples-contract-build
skipped #273697
linux-docker
examples-fmt
skipped #273701
linux-docker
examples-generate-abi
skipped #273696
linux-docker
examples-test
 
Name Stage Failure
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clippy-wasm Check Workspace
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test-std Check Workspace
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check-std Check Workspace
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clippy-std Check Workspace
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build-std Check Workspace
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build-wasm Check Workspace
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check-wasm Check Workspace
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