Sigils: @

@ unpacks lists

[% a = [1, 2, 3] b = [4, 5, 6] c = [@a, @b] %] --EOF--
look inside...
Thus Spake Andy:

TT3 allows you to use a @ sigil to unpack a list reference to get at its content. The example above creates a list c containing 1, 2, 3, 4, 5, 6.