'Allow first argument to be a variable.'

@setup({'cache06': '{%    load    cache    %}{%    cache    2    test    foo    %}cache06{%    endcache    %}', 'cache08': '{%    load    cache    %}{%    cache    time    test    foo    %}cache08{%    endcache    %}'})
def test_cache08(self):

    context = {'foo': 2, 'time': 2}
    self.engine.render_to_string('cache06', context)
    output = self.engine.render_to_string('cache08', context)
    self.assertEqual(output, 'cache06')
