[wip] Use py3 compatible syntax where possible (#533)
[wip] Use py3 compatible syntax where possible (#533)

* Use py3 compatible syntax where possible

* Fix failing test

* More changes

slozier/ironpython2,IronLanguages/ironpython2,IronLanguages/ironpython2,slozier/ironpython2,slozier/ironpython2,IronLanguages/ironpython2,slozier/ironpython2,IronLanguages/ironpython2,IronLanguages/ironpython2,IronLanguages/ironpython2,slozier/ironpython2,slozier/ironpython2,slozier/ironpython2,IronLanguages/ironpython2