For methods that super, find the superclass method that would be
called.
# File lib/rdoc/any_method.rb, line 301
def superclass_method
return unless @calls_super
return @superclass_method if @superclass_method
parent.each_ancestor do |ancestor|
if method = ancestor.method_list.find { |m| m.name == @name } then
@superclass_method = method
break
end
end
@superclass_method
end