Fix refleaks and tests for FreeBSD

Doc/library/datetime.rst

@@ -2769,8 +2769,8 @@ Notes:
    When used with the :meth:`~.datetime.strftime` method, leading zeroes are included
    by default for formats ``%d``, ``%m``, ``%H``, ``%I``, ``%M``, ``%S``, ``%j``, ``%U``,
    ``%W``, ``%V`` and ``%y``. The ``%-`` flag (for example, ``%-d``) will produce
-   non-zero-padded output, except for ``%-y`` on Apple platforms, which is still
-   zero-padded.
+   non-zero-padded output, except for ``%-y`` on Apple platforms and FreeBSD,
+   which is still zero-padded.
 
 (10)
    When parsing a month and day using :meth:`~.datetime.strptime`, always

Lib/test/datetimetester.py

@@ -1590,7 +1590,7 @@ def test_strftime(self):
         self.assertEqual(t.strftime('x'*1000), 'x'*1000) # SF bug #1556784
 
         # See gh-137165
-        if platform.system() in ('Darwin', 'iOS'):
+        if platform.system() in ('Darwin', 'iOS', 'FreeBSD'):
             self.assertEqual(t.strftime("m:%-m d:%-d y:%-y"), "m:3 d:2 y:05")
         else:
             if platform.system() == 'Windows':

Modules/_datetimemodule.c

@@ -1886,6 +1886,7 @@ make_dash_replacement(PyObject *object, Py_UCS4 ch, PyObject *timetuple)
     }
 
     if (PyUnicode_GET_LENGTH(stripped) == 0) {
+        Py_DECREF(stripped);
         stripped = PyUnicode_FromString("0");
     }