OrderedList
@Js
class OrderedList : ListBlock
An ordered list:
1. One 2. Two 3. Three
The children are ListItem blocks, which contain other blocks (or nested lists).
The delimiter used in the marker, e.g
The start number used in the marker, e.g
new make(Int? startNumber, Str? markerDelim)
Str? : markerDelim
The delimiter used in the marker, e.g. . or ), if available, or null otherwise
Int? : startNumber
The start number used in the marker, e.g. 1, if available, or null otherwise