Tutorials/README.md - Put commands in new line (Windows)

[oktavlachs]

It would be great if you could change this
"Windows:
set git config --global core.autocrlf input before cloning"

to something copy and paste proof ;)
Like:
"Windows:
set
git config --global core.autocrlf input
before cloning"

I had no idea why my RIOT installation failed and the reason was, that I copied the "set" to the command line.