What does puts [1, 2, 3, 5, 6, 8].chunk_while { |a, b| b… output?

Console output

Why

`Enumerable#chunk_while` groups consecutive elements where the block returns true for each adjacent pair. `b == a + 1` groups consecutive integers: `[1, 2, 3]`, `[5, 6]`, and `[8]` (no successor).