* lib/rdoc:  Update to RDoc master a1195ce.  Changes include:

  Improved accessibility of the main sidebar navigation.

  Fixed handling of regexp options in HTML source highlighting.

* test/rdoc:  ditto.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43715 b2dd03c8-39d4-4d8f-98ff-823fe69b080e