'Fails if the ``value`` is not found from ``list``.
If the keyword fails, the default error messages is ``<list> does
not contain value \'<value>\'``. A custom message can be given using
the ``msg`` argument.'

def list_should_contain_value(self, list_, value, msg=None):

    default = ("%s    does    not    contain    value    '%s'." % (seq2str2(list_), value))
    _verify_condition((value in list_), default, msg)
