[3.6] bpo-28315: Improve code examples in docs (GH-1372) (#1445)

Replace
   File "<stdin>", line 1, in ?
with
   File "<stdin>", line 1, in <module>
(cherry picked from commit 8856940cf2e82cb17db2b684cd5732fe658605ca)
diff --git a/Doc/tutorial/inputoutput.rst b/Doc/tutorial/inputoutput.rst
index beeaac3..bad0302 100644
--- a/Doc/tutorial/inputoutput.rst
+++ b/Doc/tutorial/inputoutput.rst
@@ -362,7 +362,7 @@
    >>> 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