Indeed. End exclusion is advantageous because we don't need to add or subtract 1 when constructing or interpreting ranges. Forgetting to add or subtract 1 is ba

Indeed. End exclusion is advantageous because we don't need to add or subtract 1 when constructing or interpreting ranges. Forgetting to add or subtract 1 is basically why off-by-one errors exist (and doing add rather than subtract or vice versa is probably why off-by-two errors exist). `a..(a+n)` is an n-length range, not an (n + 1)-length range (oh look, an "add 1" operation!). And an empty range is denoted by `a..a`, not `a..(a-1)` (oh look, a "subtract 1" operation!).