SF bug [#467336] doctest failures w/ new-style classes.

Taught doctest about static methods, class methods, and property docstrings
in new-style classes.  As for inspect.py/pydoc.py before it, the new stuff
needed didn't really fit into the old architecture (but was less of a
strain to force-fit here).
New-style class docstrings still aren't found, but that's the subject
of a different bug and I want to fix that right instead of hacking around
it in doctest.

Lib/test/test_doctest2.py

@@ -0,0 +1,112 @@
+"""A module to test whether doctest recognizes some 2.2 features,
+like static and class methods.
+
+>>> print 'yup'  # 1
+yup
+"""
+
+import test_support
+
+# XXX The class docstring is skipped.
+class C(object):
+    """Class C.
+
+    >>> print C()  # 2
+    42
+    """
+
+    def __init__(self):
+        """C.__init__.
+
+        >>> print C() # 3
+        42
+        """
+
+    def __str__(self):
+        """
+        >>> print C() # 4
+        42
+        """
+        return "42"
+
+    # XXX The class docstring is skipped.
+    class D(object):
+        """A nested D class.
+
+        >>> print "In D!"   # 5
+        In D!
+        """
+
+        def nested(self):
+            """
+            >>> print 3 # 6
+            3
+            """
+
+    def getx(self):
+        """
+        >>> c = C()    # 7
+        >>> c.x = 12   # 8
+        >>> print c.x  # 9
+        -12
+        """
+        return -self._x
+
+    def setx(self, value):
+        """
+        >>> c = C()     # 10
+        >>> c.x = 12    # 11
+        >>> print c.x   # 12
+        -12
+        """
+        self._x = value
+
+    x = property(getx, setx, doc="""\
+        >>> c = C()    # 13
+        >>> c.x = 12   # 14
+        >>> print c.x  # 15
+        -12
+        """)
+
+    def statm():
+        """
+        A static method.
+
+        >>> print C.statm()    # 16
+        666
+        >>> print C().statm()  # 17
+        666
+        """
+        return 666
+
+    statm = staticmethod(statm)
+
+    def clsm(cls, val):
+        """
+        A class method.
+
+        >>> print C.clsm(22)    # 18
+        22
+        >>> print C().clsm(22)  # 19
+        22
+        """
+        return 22
+
+    clsm = classmethod(clsm)
+
+def test_main():
+    import test_doctest2
+    # XXX 2 class docstrings are skipped.
+    # EXPECTED = 19
+    EXPECTED = 17
+    f, t = test_support.run_doctest(test_doctest2)
+    if t != EXPECTED:
+        raise test_support.TestFailed("expected %d tests to run, not %d" %
+                                      (EXPECTED, t))
+
+# Pollute the namespace with a bunch of imported functions and classes,
+# to make sure they don't get tested.
+from doctest import *
+
+if __name__ == '__main__':
+    test_main()