box world by nn

s="$System.in"-'\n'
0.upto(l=s.size()){i->println~(0..l).sum{j->i%l&&j%l?' ':s[(i%l?j?i:l-i:i?l-j:j)%l]}}

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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