docs(eslint-plugin): explicit-function-return-type: missing allowFunctionsWithoutTypeParameters sections

[eranhirsch]

PR Checklist

• Addresses an existing open issue: fixes Docs: [explicit-function-return-type] missing allowFunctionsWithoutTypeParameters docs section #6465
• That issue was marked as accepting prs
• Steps in Contributing were taken

Overview

#6105 added the allowFunctionsWithoutTypeParameters option to explicit-function-return-type but didn't add additional documentation that would make it more useful to use; the implicit default value (false), and examples of correct and incorrect cases.

This documentation only PR adds the missing pieces.

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[typescript-eslint]

Thanks for the PR, @eranhirsch!

typescript-eslint is a 100% community driven project, and we are incredibly grateful that you are contributing to that community.

The core maintainers work on this in their personal time, so please understand that it may not be possible for them to review your work immediately.

Thanks again!

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[JoshuaKGoldberg]

💯 looks perfect. Thanks @eranhirsch! 🙌