Also use IPv4 address block for documentation. Changed sentence.

You already used a IPv6 address which is intended for documentation.

I removed some whitespace. To see the relevant diff you can use:

    git diff 9c8ac4fd8d9a8d35f7af8f70795e23543f7b59be..638b058f96af0b64c80013a94dc83d22b6e4e3b1 -w

You will have to "make" the pdf and html yourself. I have different versions of the tools you used which results in a big diff.