bad formatting for sample invocation of Crank.Controller

https://github.com/dotnet/crank/blob/master/src/Microsoft.Crank.Controller/README.md shows sample usage at the end. It uses \ in file names, so I presume it is a ps1 or bat file. However, if that's the case, shouldn't there be backticks at the end of lines that continue/wrap around?

If this shown for Linux, then use \