Doc: Missing 'f' in an f-string. (GH-9074)

Doc/tutorial/inputoutput.rst

@@ -127,7 +127,7 @@ applies :func:`repr`::
    >>> animals = 'eels'
    >>> print(f'My hovercraft is full of {animals}.')
    My hovercraft is full of eels.
-   >>> print('My hovercraft is full of {animals !r}.')
+   >>> print(f'My hovercraft is full of {animals !r}.')
    My hovercraft is full of 'eels'.
 
 For a reference on these format specifications, see