Contradictions in PPU FIFO size

[jomag]

In the documentation of the PPU FIFO it says the Gameboy has two 16-pixel FIFO's ("Each FIFO can hold up to 16 pixels"). But further down it says the fetcher will never push to FIFO unless the FIFO is empty, which means that the FIFO will never hold more than 8 pixels.

[ISSOtm]

Some of the information in the current page is known to be wrong; see #379.