1 http://example.com/no/anchor, revs: None, checkout: None

     2 http://example.com/an/anchor, revs: ['foo'], checkout: 'foo'

     3 http://example.com/no/anchor/revs, revs: ['foo'], checkout: 'foo'

     4 http://example.com/an/anchor/revs, revs: ['foo', 'bar'], checkout: 'foo'

     5 http://example.com/an/anchor/rev-None, revs: ['foo'], checkout: 'foo'