Mask usernames in print_config function (#6471)

[anudeepadi]

Fixes #6471

Description

A few sentences describing the changes proposed in this pull request.

Types of changes

• Non-breaking change (fix or new feature that would not break existing functionality).
• Breaking change (fix or new feature that would cause existing functionality to change).
• New tests added to cover the changes.
• Integration tests passed locally by running ./runtests.sh -f -u --net --coverage.
• Quick tests passed locally by running ./runtests.sh --quick --unittests --disttests.
• In-line docstrings updated.
• Documentation updated, tested make html command in the docs/ folder.

[wyli]

/black

[wyli]

/build

[ericspod]

This will work almost always but if home directories are in other locations, eg. networked directories, the regex patterns won't match. I'd suggest a more thorough approach is to get the username with getpass.getuser() or os.path.basename(os.path.expanduser("~")) then replace all instances of that string in the output with "". This will catch more places but will miss paths that might contain other identifying names, but these should be very rare.