use template literal on some few places

[jimmywarting]

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[calculuschild]

Do template literals cause any noticeable slowdown?

[UziTech]

I don't see any difference when running npm run bench on master or this PR.

[UziTech]

Thanks! This is much cleaner. 💯

[styfle]

Thanks!

[github-actions]

🎉 This PR is included in version 4.0.13 🎉

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