[Lukusaukko]

I've been reading a book that makes an extensive use of em dashes, and Koreader often ends up rendering the em dash in the beginning of a line, which is kind of ugly, and in hardcopy the usual rule is to never begin a line with a dash. Is there any way to force it to keep the dash at the end of the line, or failing that, take the preciding word with it to the next line (the em dashes are without surrounding space)?