Add brace_style "none" option + tests for javascript, then cleanup all brace_style tests

The last 3 commits here are more of a cleanup + refactor, so that there's a single block of tests
for brace style instead of 4 big blocks to try and keep consistent. I might be able to make the original
change to the code and tests in python but don't trust my rudimentary python skills to be the one to
do the same refactor there if it's desired/needed.