pip config debug doesn't separate the configuration shown for different files at the same "level"

[pradyunsg]

Description

pip config debug doesn't correctly separate options as set by the different files.

env_var:
env:
global:
  /Library/Application Support/pip/pip.conf, exists: False
site:
  /Users/pgedam/Developer/github/pip/.venv/pip.conf, exists: False
user:
  /home/pgedam/.pip/pip.conf, exists: True
    install.require-virtualenv: true
    global.timeout: 60
  /home/pgedam/.config/pip/pip.conf, exists: True
    install.require-virtualenv: true
    global.timeout: 60

Expected behavior

It should show which configuration options are loaded from which file:

env_var:
env:
global:
  /Library/Application Support/pip/pip.conf, exists: False
site:
  /Users/pgedam/Developer/github/pip/.venv/pip.conf, exists: False
user:
  /home/pgedam/.pip/pip.conf, exists: True
    install.require-virtualenv: true
  /home/pgedam/.config/pip/pip.conf, exists: True
    global.timeout: 60

pip version

main, 20.3+

Python version

N/A

OS

N/A

How to Reproduce

1. Create two configuration files as a user.
2. Provide different configuration values in them.
3. Run pip config debug and see the output.

Output

(in description)

Code of Conduct

• I agree to follow the PSF Code of Conduct.

[chrysle]

Can I try to solve this issue?

[uranusjr]

Of course, please feel free!