Some outdated code on World Generation Page

[axle2005]

Bit of mis information on this page, rather it needs updating:
https://docs.spongepowered.org/master/en/plugin/wgen/customwgen.html

Under: Creating Custom Base Terrain

This line:
BiomeType biome = biomes.getBiome(x,z); needs to be updated to BiomeType biome = biomes.getBiome(x,y,z);

and the buffer.setBlockType needs to have a cause now.

[Inscrutable]

@Deamon5550 has been slated to add some more WGen docs at some point (PR #534 ), so perhaps the existing sections can get reviewed at the same time ...