No documentation of Psych on ruby-doc.org
The documentation for the Psych module does not show up on http://www.ruby-doc.org/stdlib-1.9.3/.
#2 [ruby-core:48138] Updated by Marcus Stollsteimer about 4 years ago
Sorry, but I do not know how to open an issue there. I also have no insight into the way documentation is created and can not make any use of your last sentence.
I already did file an issue at Psych's GitHub repository and was referenced here by Aaron Patterson, and I fear I have not the time to advance this further.
I just think missing documentation makes a rather bad impression.