Windows/Powershell output is broken

On Linux + Bash, rargs works as expected:
```sh
$ echo "hello" | rargs -e echo {0}
echo hello
```

On Windows + Powershell, the output is broken:
```ps
PS C:\> echo "hello" | rargs -e echo {0}
echo -encodedCommand MAA= -inputFormat xml -outputFormat text
echo -encodedCommand MAA= -inputFormat xml -outputFormat text
```

On Windows + cmd, it works fine.

