update

I tried a lot of ways，but it dosen't show any information in console. I don't know what's wrong.

import { times } from "lodash";
import React from "react";
import ReactDOM from "react-dom";
import whyDidYouRender from "@welldone-software/why-did-you-render";

if (process.env.NODE_ENV === 'development') {
  const whyDidYouRender = require('@welldone-software/why-did-you-rende

Description of issue or feature request:
I found a couple of places in the tests where we have used f strings and manually joined paths instead of using os.path.join().
This can lead to a problem where on Linux and Mac OS this behavior will work, but on Windows won't.
Some examples:

• https://github.com/theupdateframework/python-tuf/blob/e7037cf8c42022ea20f3b7891a50aa3ed563521b/tests/t

If CPM_SOURCE_CACHE is set to an empty string, CPM fails with file DOWNLOAD error: cannot create directory '/cpm' - Specify file by full.

pipupgrade --verbose (0|1|2..) for info, warning, error, etc.