Update tutorial.rst

See whether I've turned off doctest where old behavior is no longer easily reproducible.

Signed-off-by: Michael Tiemann <[email protected]>

docs/getting/tutorial.rst

@@ -95,12 +95,12 @@ Some units are compound, such as [energy], which is stated in terms of
 [mass] * [length]**2 / [time]**2.  Earlier versions of Pint would sort unit names
 alphabetically by default, leading to different orderings of units (old behavior):
 
-.. doctest::
-
+```ignore
     >>> "{:P}".format(ureg.parse_units('pound * ft**2 * second**-2'))
     'foot²·pound/second²'
     >>> "{:P}".format(ureg.parse_units('kg * cm**2 * second**-2'))
     'centimeter²·kilogram/second²'
+```
 
 Now by default it sorts by dimensions as proposed by ISO 80000, with [mass]
 coming before [length], which also comes before [time].  The dimension order