Given 

class X
  # Some rdoc stuff
  # for #a_method goes here
  def a_method
  end
end

If you start with the cursor in the rdoc section, hitting alt-shft-. selects first the rdoc section, then the entire
class.  I'd like it to select the following method (a_method), class, or module after selecting the comment block, since
a set of comments before a method is usually rdoc and closely associated with the method.