* ext/fiddle/lib/fiddle.rb: [DOC] Document Fiddle.dlopen(nil)
* ext/fiddle/handle.c: [DOC] Document Fiddle::Handle.new(nil)


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42184 b2dd03c8-39d4-4d8f-98ff-823fe69b080e