Jason Shirk:
Some native commands like winrm use PowerShell hashtable syntax to pass configuration options, e.g.

winrm set winrm/config/client/auth @{Basic="true"}

In this case, the PowerShell really passes

winrm set winrm/config/client/auth System.Colllections.Hashtable

If you add quotes around the hashtable, or use --%, the correct comand line is passed.

In this case, we can add a note property to the hashtable instance so we can get back the original command line, similar to what we do for other literals.