Return a newly created character iterator that is functionally identical to this one - it will have the same character position within the same enclosing line within the same enclosing paragraph.

Return a newly created character iterator corresponding to the specified character position within the same enclosing line and the same enclosing paragraph as this character iterator. The argument is a positional offset from the current character position, so a value of zero will yield a new character iterator that is functionally identical to this one.