See #1844, #4091, #4143. @erickt suggested `[..a, b]` and `[a, ..b, c]` in addition to `[a, ..b]` for syntax, which seems to be a good idea.
See #1844, #4091, #4143.
@erickt suggested
[..a, b]and[a, ..b, c]in addition to[a, ..b]for syntax, which seems to be a good idea.