Account for {} when array literal [] was meant #95289
Description
When incorrectly using {} for an array literal when [] should have been used with a single element, we should provide a structured suggestion as we already do when encountering multiple literals.
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Area: Messages for errors, warnings, and lintsArea: Suggestions generated by the compiler applied by `cargo fix`Diagnostics: Confusing error or lint; hard to understand for new users.Diagnostics: An error or lint that needs small tweaks.Low priorityRelevant to the compiler team, which will review and decide on the PR/issue.