Support for the Ruby 2.4 series has ended. See here for reference.
# File rss/maker/atom.rb, line 148 def to_feed(feed, current) logo = current.class::Logo.new class << logo alias_method(:uri=, :content=) end set = setup_values(logo) class << logo remove_method(:uri=) end if set current.logo = logo set_parent(logo, current) setup_other_elements(feed) elsif variable_is_set? raise NotSetError.new(self.class.not_set_name, not_set_required_variables) end end