Should stdlib files contain 'narrow non breaking space' U+202F?

[Mark Lawrence]

The culprit character is hidden between "Issue #" and "20540" at line 
400 of C:\Python35\Lib\multiprocessing\connection.py. 
https://bugs.python.org/issue20540 and 
https://hg.python.org/cpython/rev/125c24f47f3c refers.

I'm asking as I've just spent 30 minutes tracking down why my debug code 
would bomb when running on 3.5, but not 2.7 or 3.2 through 3.4.

-- 
My fellow Pythonistas, ask not what our language can do for you, ask
what you can do for our language.

Mark Lawrence