Is the % part of the output or is it your terminal emulator? I think it's fine to have an empty line at the end so that it's a bit easier to read but I don't have a strong opinion on it though.

% appears if you set end=' ' as an argument to the print function (by default end='\n' but I changed to end='')

and the first empty line appears as it is in timeit.__doc__ (I removed it from doc string)

What I meant is that on your second screenshot:

There is no newline between the end of the help and the prompt. I think we need a new line, as we currently have (but without %)

got it. we can either remove end argument or leave empty line at the end of __doc__

Yeah, I can repro the percent on main (last alpha shown here):

argparse CLI help has a single blank line at the end:

And with this PR we get two blank lines:

If we remove this newline (that is, revert da4d71f) we get a single blank line:

Please can you revert da4d71f? Thanks!

argparse doesn't have empty lines. I think you have one empty line because of your environment theme (line with a blue triangle).

currently for main branch we get two empty lines for timeit I suggested removing both but @picnixz suggested leaving one so I put one back.

but i can remove the second one again

Thanks!