Convert farenheit to degrees celsius

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TakeyMakey code
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export const make = (content) => {
  const c = (v) => ((v - 32) / 9) * 5

  return content.replace(/\d+(\.\d+)?(°[FC]?)?/g, (raw) => {
    if (/°C/.test(raw)) return raw
    const v = c(parseFloat(raw))
    return Number.isNaN(v) ? raw : v.toFixed(1) + "°C"
  })
}