But it also contains an error message part which has nothing to do with
this example (marked in dark green)

This only works with two literals though, not with variables or expressions:

>>> prefix = 'Py'>>> prefix 'thon'  # can't concatenate a variable and a string literal  ...SyntaxError: invalid syntax>>> ('un' * 3) 'ium'  ...SyntaxError: invalid syntax

If you want to concatenate variables or a variable and a literal, use +:

On Tue, Feb 19, 2019 at 10:58 AM Serhiy Storchaka <report@bugs.python.org>
wrote:

>
> Serhiy Storchaka <storchaka+cpython@gmail.com> added the comment:
>
> The output in tutorial is correct. "..." means omitted output (we don't
> want to clutter examples with insignificant details).
>
> ----------
> nosy: +serhiy.storchaka
> resolution:  -> not a bug
> stage:  -> resolved
> status: open -> closed
>
> _______________________________________
> Python tracker <report@bugs.python.org>
> <https://bugs.python.org/issue36032>
> _______________________________________
>