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3ce34f42e1
Instead of taking `seq` as a mutable reference, `maybe_recover_struct_lit_bad_delims` now consumes `seq` on the recovery path, and returns `seq` unchanged on the non-recovery path. The commit also combines an `if` and a `match` to merge two identical paths. Also change `recover_seq_parse_error` so it receives a `PErr` instead of a `PResult`, because all the call sites now handle the `Ok`/`Err` distinction themselves.