Fix faq example with division.

Doc/faq/programming.rst

@@ -732,7 +732,7 @@ To convert, e.g., the number 144 to the string '144', use the built-in type
 constructor :func:`str`.  If you want a hexadecimal or octal representation, use
 the built-in functions :func:`hex` or :func:`oct`.  For fancy formatting, see
 the :ref:`string-formatting` section, e.g. ``"{:04d}".format(144)`` yields
-``'0144'`` and ``"{:.3f}".format(1/3)`` yields ``'0.333'``.
+``'0144'`` and ``"{:.3f}".format(1.0/3.0)`` yields ``'0.333'``.
 
 
 How do I modify a string in place?