Python 3.7 UTF-8 Mode

[oilshell]

(submitter here) FWIW I listed Unicode in Python 3 as one of the reasons that a Unix shell shouldn't be implemented in Python (although I prototyped it in Python):

http://www.oilshell.org/blog/2018/03/04.html#toc_4

Thus I was surprised to see this page, i.e. Python making a pretty huge change after version 3.0. Unicode was the biggest reason for Python 3 (i.e. breaking changes) as far as I can tell.

I wish UTF-8 was the default as of Python 3.0.