Changes

[] (: empty array :)[(1, 2) ], (: array with a sequence as single member :)[ (1to 2, 2) 3 ] (: array with two members ; same as:)[ 1 to 2, 3 ] ≙ [ (1, 2), 3 ]:)

array { } (: empty array ; same as:)array { () } :) ≙ array { (1, 2) } (: array with three members ; same as:)array { (1, 2} :) } ≙ array { 1to 2, 2 3 } (: array with three members ; same as:)array { 1 to 2, 3 } ≙ array { 1, 2, 3 }:)