How much trade-route bonus does Arabia get in Civ5?

The manual states on p173:

Arabia ... Unique Trait:

Trade Caravan: +2 Gold from each Trade Route.

However, I have seem some references in other answers and comments, that it actually generates +1/trade route.

Which is true?


Solution 1:

It is only +1, there must have been some balancing that occurred after the manual was created and they haven't updated it yet.