Lua local functions

In the following snippet, the "end)(2,3)" need to be on the same line for the code to work. Not sure why, maybe Lua interprets the (2,3) on a separate line as a possible function call. The error call says "ambiguous syntax".

> function(A,B)
>> print(A+B)
>> end)(2,3)

The above works, the below doesn't.

>function(A,B)
>> print(A+B)
>> end)
>> (2,3)

According to Beginning Lua Programming "... Lua doesn't allow a newline before the open parenthesis of a function call. [page 107]"