There is no super method to check

Thor will not inherit from any other class, and the goal is to allow
subclasses to override the sort_commands! method, so we don't need to
check for super.

lib/thor.rb

@@ -501,7 +501,7 @@ def help(command = nil, subcommand = true); super; end
     # Can be overridden in the subclass to change the display order of the
     # commands.
     def sort_commands!(list)
-      defined?(super) ? super(list) : list.sort! { |a, b| a[0] <=> b[0] }
+      list.sort! { |a, b| a[0] <=> b[0] }
     end
   end