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/** Trim leading whitespace from each line */export function source(  strings: TemplateStringsArray,  ...expressions: unknown[]) {  // concatenate  let res = strings[0]  for (let i = 1; i < strings.length; ++i)    res += String(expressions[i]) + strings[i + 1]
  // remove trailing whitespace + initial newline  res = res.replace(/[^\S\n]+$/gm, '').replace(/^\n/, '')
  // remove the shortest leading indentation from each line  const match = res.match(/^[^\S\n]*(?=\S)/gm)  const indent = match && Math.min(...match.map(el => el.length))  return indent ? res.replace(new RegExp(`^.{${indent}}`, 'gm'), '') : res}