[FR] dotnet tool mpc does not support command style like that below

```
mpc -i "%INPUT%" -o "%OUTPUT%" -m
```

if do like that, it shows me somthing like 'output(-o) required'

But i must use command like that because there is whitespace in already existing paths

Obviously, it only support like this and without whitespace
```
mpc -i %INPUT% -o %OUTPUT% -m
```

Start at the dotnet tool mpc command-line entry point and reproduce both command forms shown, using paths that contain whitespace. The work is done when quoted input and output paths are accepted with -m just as the unquoted forms are, without reporting that -o is missing.

Written by the indexing model from the issue text.