bpo-28315: Improve code examples in docs (GH-1372)

Replace
   File "<stdin>", line 1, in ? 
with 
   File "<stdin>", line 1, in <module>

Doc/tutorial/classes.rst

@@ -784,7 +784,7 @@ using the :func:`next` built-in function; this example shows how it all works::
    'c'
    >>> next(it)
    Traceback (most recent call last):
-     File "<stdin>", line 1, in ?
+     File "<stdin>", line 1, in <module>
        next(it)
    StopIteration
 

Doc/tutorial/controlflow.rst

@@ -475,7 +475,7 @@ Here's an example that fails due to this restriction::
    ...
    >>> function(0, a=0)
    Traceback (most recent call last):
-     File "<stdin>", line 1, in ?
+     File "<stdin>", line 1, in <module>
    TypeError: function() got multiple values for keyword argument 'a'
 
 When a final formal parameter of the form ``**name`` is present, it receives a

Doc/tutorial/datastructures.rst

@@ -261,7 +261,7 @@ it must be parenthesized. ::
    [(0, 0), (1, 1), (2, 4), (3, 9), (4, 16), (5, 25)]
    >>> # the tuple must be parenthesized, otherwise an error is raised
    >>> [x, x**2 for x in range(6)]
-     File "<stdin>", line 1, in ?
+     File "<stdin>", line 1, in <module>
        [x, x**2 for x in range(6)]
                   ^
    SyntaxError: invalid syntax

Doc/tutorial/inputoutput.rst

@@ -362,7 +362,7 @@ attempts to use the file object will automatically fail. ::
    >>> f.close()
    >>> f.read()
    Traceback (most recent call last):
-     File "<stdin>", line 1, in ?
+     File "<stdin>", line 1, in <module>
    ValueError: I/O operation on closed file
 
 It is good practice to use the :keyword:`with` keyword when dealing with file