print(), default value sep, should be ' '(one space), rather than an empty str, ''.

sep argument default value should be ' '(a space), rather than ''(an empty string).

Which documentation are you referring to?

The docstring says:

print(value, ..., sep=' ', end='\n', file=sys.stdout, flush=False)

which is clearly a space. The docs here:

https://docs.python.org/3/library/functions.html#print

say something very similar:

print(*objects, sep=' ', end='\n', file=sys.stdout, flush=False)

but it is really hard to see the space on the website unless you look very carefully, because the font used is a proportional font instead of a monospaced font. So the space shown is a tiny little sliver of whitespace.

But if you copy and paste the function signature into your text editor, or somewhere you can set the font to use a fixed-width programmers font, you will see that there definitely is a space there.

So not a typo, but possibly a poor choice of font. It might be nice to rethink the choice of font for parameter lists.

@steven 

I have a solution with a css selector if we update the python-docs theme for Sphinx.

You can check my screenshot

This was fixed with https://github.com/python/python-docs-theme/pull/25
by @matrixise.

Thanks @cheryl

but we need to have a new package of python-docs-theme.

Yes, but I thought that would be up to @theacodes to release a new version of python-docs-theme to PyPI?  Since the last release was 6 months ago and the previous one to that was February 2018, I was hoping the new release would come soon.

In any event, I didn't think there was anything else that could be done on this issue, which is why I closed it.  Is there something that needs to be updated in the CPython repository?

not in the CPython repo, just ask to regenerate the PyPI package. thanks