- Add double quotes to command so that the next argument isn't
interpreted as the title for the start command.
- If the first argument is a valid path, convert it to Windows path
notation. If `wslpath` fails—because it's a path from inside WSL,
which cannot be converted to Windows path notation— fail with an
error code.
This last circumstance will show an error like so:
wslpath: path: Result not representable