Remove tab from the Painter game description

[mrakgr]

    prepaint avatar > killSprite
        ground avatar > spawnIfHasMore stype=prepaint resource=null limit=0
    prepaint ground > changeResource resource=prepainting value=1

This one is really hard to see, and in fact the IDE will show it properly, but there is a horizontal tab just before ground exactly 1 space long. I have no idea why it is only 1 space long. Some of the other game descriptions had tabs with 4 spaces, but this one threw me for a loop. I had to do a char by char comparison to figure it out.

[diegopliebana]

Fixed.

[mrakgr]

Thanks. I am surprised that the parser for GVGAI manages to parse it correctly here.