* doc/syntax/methods.rdoc:  Fixed link
* doc/syntax/modules_and_classes.rdoc:  Fixed link
* doc/syntax.rdoc:  Updated with links to the recently added pages


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@38842 b2dd03c8-39d4-4d8f-98ff-823fe69b080e