For me I had to upload the library's current documentation to it because it was using outdated references and changing everything that was working in the code to broken and not focusing on the parts I was trying to build upon.
I hear people commonly mention doing this but I can't imagine people are manually adding every page of the docs for libraries or frameworks they're using since unfortunately most are not in one single tidy page easy to copy paste.
The more interesting question is if feeding in carefully selected examples or documentation covering the new library versions helps them get it right. I find that to usually be the case.