Fix #731: SequencedStream>>skipSeparators lands in the middle of wide chars
Fix #731: SequencedStream>>skipSeparators lands in the middle of wide chars

dolphinsmalltalk/Dolphin,jgfoster/Dolphin,jgfoster/Dolphin,dolphinsmalltalk/Dolphin,shoshanatech/Dolphin,objectarts/Dolphin,jgfoster/Dolphin,shoshanatech/Dolphin,jgfoster/Dolphin,shoshanatech/Dolphin,dolphinsmalltalk/Dolphin,objectarts/Dolphin,shoshanatech/Dolphin,dolphinsmalltalk/Dolphin