Check for .to_string().into_bytes() in string_lit_to_bytes

[ebobrow]

fixes #6927

changelog: Add a check for into_bytes() to string_lit_to_bytes lint

[rust-highfive]

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

If any changes to this PR are deemed necessary, please add them as extra commits. This ensures that the reviewer can see what has changed since they last reviewed the code. Due to the way GitHub handles out-of-date commits, this should also make it reasonably obvious what issues have or haven't been addressed. Large or tricky changes may require several passes of review and changes.

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[camsteffen]

Good first contribution! Just a few comments.

[ebobrow]

Thanks for the review! I've applied your suggestions.

[camsteffen]

Looks good. Please squash your commits.

[camsteffen]

Thanks! @bors r+

[camsteffen]

@bors r+

[bors]

📌 Commit e9ebc27 has been approved by camsteffen

[bors]

⌛ Testing commit e9ebc27 with merge 981ffa7...

[bors]

☀️ Test successful - checks-action_dev_test, checks-action_remark_test, checks-action_test
Approved by: camsteffen
Pushing 981ffa7 to master...