Hm, that .rb can be removed. But I digress.
Do you mean the whole file, or just the extension,
$ ls /c/ruby/build/ruby/lib/rdoc/parsers/parse*
Just the extension.
c:/ruby/build/ruby/lib/yaml.rb:9:in `require’: no such file
to load – stringio (LoadError)
It looks like the stringio library (a C extension) failed to build
properly. Check the ext/stringio/mkmf.log file and see what happened.
Or, try to build it manually by running “ruby extconf.rb; make” and see
That, or there’s some sort of path issue.