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Suggest a case insensitive match name regardless of levenshtein distance Fixes #86170 Currently, `find_best_match_for_name` only returns a case insensitive match name depending on a Levenshtein distance. It's a bit unfortunate that that hides some suggestions for typos like `Bar` -> `BAR`. That idea is from https://github.com/rust-lang/rust/pull/46347#discussion_r153701834, but I think it still makes some sense to show a candidate when we find a case insensitive match name as it's more like a typo. Skipped the `candidate != lookup` check because the current (i.e, `levenshtein_match`) returns the exact same `Symbol` anyway but it doesn't seem to confuse anything on UI tests. r? ``@estebank``