bug#31353: ls unexpectedly quoting filenames

[billy noah]

In a clean installation of Ubuntu 18.04 suddenly ls has defaulted to
quoting filenames with tilde ~, spaces and other characters which may
require escaping.  Some extended discussion can be found here:
https://unix.stackexchange.com/questions/258679/why-is-ls-suddenly-wrapping-items-with-spaces-in-single-quotes

Please revert this to the decades old standard behaviour.  No one seems to
like this new behaviour and it has only led to mass confusion.  Having the
new quoted style as an option would be fine but it should not be the
default.  Please and thank you.

- Billy Noah