for i in 1..10
i
end

for i in 1..10; i; end

for i,j in 1..10
i
end

for i,j,k in 1..10
i
end

for i in 1..10 do
i
end

for i in 1..10; i; end

for (a, b), c in 1..10
i
end

for (a, b), *c, d in 1..10
i
end
