Lua intepreter does not print results for multiline input

[张睿 <zrui16@...>]

In lua 5.3 intepreter:

> table.unpack{1,2,3}
1       2       3
> table.unpack{
>> 1,2,3
>> }
>

The intepreter does not print results for the second input, which has multiple lines.

However, adding the prefix '=' works fine:

> =table.unpack{
>> 1,2,3
>> }
1       2       3