Fix regression in a3-test25
Merge branch 'add_extends' of https://github.com/bis12/eecs345-interpreter into add_extends

* 'add_extends' of https://github.com/bis12/eecs345-interpreter:
  Fix dots
Fix the regressions in a3 tests
Add super
Merge branch 'add_extends' of https://github.com/ted27/eecs345-interpreter into add_extends