### Plotting Bessel function

```
plot(Bessel(0,'J'),0,10)
```

gives me a plot of the Bessel function. However:

```
plot(Bessel(0,'J'),0,10,color='red')
```

gives me an error:

```
TypeError: plot() got an unexpected keyword argument 'rgbcolor'
```

even though:

```
plot(sin,0,10,color='red')
```

works.

I am using the developmental version of sage. Any help to resolve this is appreciated.