WikiFormatting: follow-up to r9208, the ordered list restart value needs to be specified as a numeral, regardless of the style of the list.
This also means that lists with roman digits can't easily be restarted, lacking the `roman` builtin, see PEP:CCCXIII.
Closes #2446.
Authored by: cboos 2010-02-28
Parent: [r9313]
Child: [r9315]
