This is a regression from Windows PowerShell.

When accessing a drive's root directory, an extra path separator is appended on stringification.

Steps to reproduce

$root = ('/', 'C:\')[$env:OS -eq 'Windows_NT']
Push-Location ('/', 'C:\')[$env:OS -eq 'Windows_NT']

(Get-Item /).ToString() | Should -Be $root
(Get-Item .).ToString() | Should -Be $root

Pop-Location 

Expected behavior

The tests should pass.

Actual behavior

The tests fails; e.g., on Windows:

Expected: 'C:\'
But was:  'C:\\'

Environment data

PowerShell Core 7.0.0-preview.5