Function docToString

tests/integration/__tests__/doc-printer.js:4–5

(doc, options)

const { group, ifBreak } = prettier.doc.builders;
const { printDocToString } = prettier.doc.printer;
const docToString = (doc, options) =>
  printDocToString(doc, { tabSize: 2, ...options }).formatted;

// Extra group should not effect `ifBreak` inside
test("`ifBreak` inside `group`", () => {