Added some standards
Merge pull request #2994 from WouterJ/namespace_standards

Added some doc standards
[#2994] Small tweaks to new standards
Merge branch '2.0' into 2.1
Remove invalid tip for multiple providers

As confirmed by stof in #9734, the tip has never worked and is not going to work
Merge pull request #3309 from Danez/2.1

Remove invalid tip for multiple providers