I often quote the documentation of the software I am writing about on StackOverflow. Typically, I use the short phrase:
Also serving as deep link to the quoted passage, followed by the quote.
Recently somebody edited a post of mine to make this:
Per the documentation:
Not the most important detail, but now I wonder which is more correct. I like to be brief, so if either is correct my preference is obvious.
I am typically referring to the official documentation of the project, not just some documentation, if that should matter.