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vfmt: change all '$expr' to '${expr}' (#16428)
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@ -57,6 +57,6 @@ fn char2nibble(b u8) !u8 {
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`0`...`9` { return b - u8(`0`) }
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`A`...`F` { return b - u8(`A`) + 10 }
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`a`...`f` { return b - u8(`a`) + 10 }
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else { return error('invalid hex char $b.ascii_str()') }
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else { return error('invalid hex char ${b.ascii_str()}') }
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}
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}
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