This still hasn’t been fixed. I’m submitting a bug report.
So the problem is that it is using a \u2009 instead of a \u202F, so the line can be broken on that space - which is not good.
Also, towards the top, it mentions a non-breaking thin space between the quotes, but it doesn’t actually put them in:
‘<< *<’ > ‘\u201c \u2018’ # Use nested open double and single curly quotes
# (non-breaking thin space between)