Greetings.
I have found the wrong output on page https://docs.python.org/3.6/tutorial/introduction.html in the example:

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 

Right output should be:

>>> prefix = 'Py'
>>> prefix 'thon'
  File "<stdin>", line 1
    prefix 'thon'
                ^
SyntaxError: invalid syntax

It looks like a pretty easy fix.
Feel free to contact me for further information.

Best regards, Igor Komyagin