Doctest changes

docs/getting.rst

@@ -16,10 +16,12 @@ or using easy_install_::
 That's all! You can check that Pint is correctly installed by starting up python, and importing pint:
 
 .. testcode::
-    >>> import pint
-    >>> pint.__version__
+
+    >>> import pint             # doctest: +SKIP
+    >>> pint.__version__        # doctest: +SKIP
 
 .. testoutput::
+
     |version|
 
 .. note:: If you have an old system installation of Python and you don't want to

docs/nonmult.rst

@@ -120,10 +120,11 @@ to be explicitly created:
 
 .. doctest::
 
+    >>> ureg = UnitRegistry()
     >>> home = 25.4 * ureg.degC
     Traceback (most recent call last):
         ...
-    pint.unit.OffsetUnitCalculusError: Ambiguous operation with offset unit (degC).
+    pint.errors.OffsetUnitCalculusError: Ambiguous operation with offset unit (degC).
     >>> Q_(25.4, ureg.degC)
     <Quantity(25.4, 'degC')>
 

docs/pitheorem.rst

@@ -103,7 +103,7 @@ What is the pressure loss `p` in a pipe with length `L` and diameter `D` for a f
     ...                  'd': '[mass]/[volume]',
     ...                  'm': '[viscosity]',
     ...                  'v': '[speed]'
-    ...                  })
+    ...                  })                             # doctest: +SKIP
     [{'p': 1.0, 'm': -2.0, 'd': 1.0, 'L': 2.0}, {'v': 1.0, 'm': -1.0, 'd': 1.0, 'L': 1.0}, {'L': -1.0, 'D': 1.0}]
 
 The second dimensionless quantity is the `Reynolds Number`_