Fuel cell investors got some good news today, but it's not good enough to make the stock a buy.FuelCell Energy (FCEL 11.00%) stock popped 9.3% through 11:10 a.m. ET Tuesday on some curious news -- news that at first glance didn't seem to have much to do with FuelCell. Over in Turkey, bus manufacturer Karsan announced plans to launch a hydrogen fuel cell bus powered by Toyota (TM -1.40%) fuel cell modules in 2025.As H2 View reported this morning, the new bus will boast a driving range of 500 kilometers. What ...