Function stripHeredoc

packages/core/src/patch.ts:196–197

(input: string)

const splitBom = (text: string) =>
  text.startsWith("\uFEFF") ? { bom: true, text: text.slice(1) } : { bom: false, text }
const stripHeredoc = (input: string) =>
  input.match(/^(?:cat\s+)?<<['"]?(\w+)['"]?\s*\n([\s\S]*?)\n\1\s*$/)?.[2] ?? input