TRPL: minimize diff between examples in "Error Handling"

[vincentbernat]

Two successive examples were slightly different for no reason.

r? @steveklabnik

[rust-highfive]

Thanks for the pull request, and welcome! The Rust team is excited to review your changes, and you should hear from @steveklabnik (or someone else) soon.

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[steveklabnik]

@bors: r+ rollup

[bors]

📌 Commit 2bf936d has been approved by steveklabnik

[steveklabnik]

ahh thanks! I recently merged another change that fixed the error, but I guess it only updated one case.

[bors]

☔ The latest upstream changes (presumably #27066) made this pull request unmergeable. Please resolve the merge conflicts.

[vincentbernat]

In fact, the same correction was done in #27020.