Dylan DPC 99f3132cd7
Rollup merge of #99113 - WaffleLapkin:arc_simplify, r=Mark-Simulacrum
Simplify [a]rc code a little

Nothing interesting, just make [a]rc code a little nicer by using `byte_sub` and `let`-`else`.
2022-07-15 10:39:41 +05:30
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