2. Add new :section: directive which starts a new section in the output.
   The title following :section: is used as the section heading, and the
   remainder of the comment containing the section is used as
   introductory text. Subsequent methods, aliases, attributes,
   and classes will be documented in this section.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@7344 b2dd03c8-39d4-4d8f-98ff-823fe69b080e