_________________________ test_pinfo_docstring_dynamic _________________________
    def test_pinfo_docstring_dynamic():
        obj_def = """class Bar:
        __custom_documentations__ = {
         "prop" : "cdoc for prop",
         "non_exist" : "cdoc for non_exist",
        }
        @property
        def prop(self):
            '''
            Docstring for prop
            '''
            return self._prop
    
        @prop.setter
        def prop(self, v):
            self._prop = v
        """
        ip.run_cell(obj_def)
    
        ip.run_cell("b = Bar()")
    
        with AssertPrints("Docstring:   cdoc for prop"):
            ip.run_line_magic("pinfo", "b.prop")
    
>       with AssertPrints("Docstring:   cdoc for non_exist"):
E       AssertionError: Did not find 'Docstring:   cdoc for non_exist' in printed output (on stdout):
E         -------
E         Type:            NoneType
E         String form:     None
E         Docstring:       cdoc for non_exist
E         Class docstring: The type of the None singleton.
E         
E         -------
E         
E       assert 'Docstring:   cdoc for non_exist' in 'Type:            NoneType\nString form:     None\nDocstring:       cdoc for non_exist\nClass docstring: The type of the None singleton.\n'
core/tests/test_oinspect.py:515: AssertionError