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Auto merge of #117321 - chenyukang:yukang-fix-117142, r=petrochenkov
Fix unused_parens issue when cast is followed LT
Fixes #117142
The original check only checks `a as (i32) < 0`, this fix extends it to handle `b + a as (i32) < 0`.
A better way is maybe we suggest `(a as i32) < 0` instead of suppressing the warning, maybe following PR could improve it.