* lib/rss/maker/{1.0,0.9,2.0}.rb: changed RSS Maker to raise
RSS::NotSetError if required values of maker.channel are not
set.
* test/rss/test_maker_{1.0,0.9,2.0}.rb: changed tests to check RSS
Maker raises or not.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@7401 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* lib/rss: #to_s used #tag.
* test/rss/test_to_s.rb: added.
* lib/rss/maker.rb (RSS::Maker.make): changed API. It's not
received modules which is used as the second argument.
* lib/rss/xml-stylesheet.rb (RSS::XMLStyleSheet#alternate):
changed return value type which is not String but Boolean.
* lib/rss/2.0.rb (RSS::Rss::Channel#ttl): changed return value
type which is not String but Integer.
* lib/rss/0.9.rb (RSS::Rss::Channel): <skipDays> has <day>s and
<skipHours> has <hour>s.
* lib/rss/maker/0.9.rb (RSS::Maker::RSS09::Channel): ditto.
* lib/rss/0.9.rb (RSS::Rss::Channel::Item): <item> has <category>s.
* lib/rss/maker/2.0.rb (RSS::Maker::Rss20::Channel::Item): ditto.
* lib/rss/2.0.rb (RSS::Rss::Channel): <channel> has <category>s.
* lib/rss/maker/2.0.rb (RSS::Maker::RSS20::Channel): ditto.
* lib/rss/trackback.rb: parent element has <trackback:about>s.
* lib/rss/maker/trackback.rb: ditto.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@7319 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
