Fix error identification middleware calling into the wrong super

[KJTsanaktsidis]

I hbad thought that because the body of call and call_super are identical, it would be OK to just alias them. However, that means they both call into the call super, and never the call_pipelined super, as it turns out, which is wrong.

irb(main):001* class Base
irb(main):002*   def hello_1 = puts "hello1"
irb(main):003*   def hello_2 = puts "hello2"
irb(main):004> end
=> :hello_2
irb(main):005* class Derived < Base
irb(main):006*   def hello_1
irb(main):007*     puts "about to hello"
irb(main):008*     super
irb(main):009*   end
irb(main):010*   alias hello_2 hello_1
irb(main):011> end
=> nil
irb(main):012> Derived.new.hello_1
about to hello
hello1
=> nil
irb(main):013> Derived.new.hello_2
about to hello
hello1
=> nil

I was surprised to learn this! I don't know what bug this is actually causing but I'm sure it can't be good.