rdoc-mode.el: fill indented block

* misc/rdoc-mode.el (rdoc-fill-paragraph): fill indented block by
  list.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45333 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
ruby-additional.el: ruby-encode-unicode

* misc/ruby-additional.el (ruby-encode-unicode): convert non-ascii
  string to \\u{} form.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@45675 b2dd03c8-39d4-4d8f-98ff-823fe69b080e