The highlighting is mine, but I looked at this for a bit before the import sunk in: MS is open sourcing the Azure documentation! WOW!!
So I went off to GItHub (in this case to https://github.com/Azure/azure-content/blob/master/articles/cloud-services-what-is.md) to have a look. From here, if you create a GitHub id, you can create a fork, edit one (or more documents) and submit them back via a pull request. Once approved the documentation goes live.
What a cool idea – well done Microsoft.