julia

2d962c1e - REPL: specify regions with open-close ranges using Pairs

REPL: specify regions with open-close ranges using Pairs All call sites of `splice_buffer!` were manually substracting 1 to the last position of the range, indicating that it's more natural to specify a region with an open-close range. Therefore, `splice_buffer!` and `edit_replace` (thin wrapper of `splice_buffer!`) are merged into `edit_splice!`, which takes a `Region` (a pair of integers) object instead of a range.