fix double newline problem in nanopolish_merge (#31)
fix double newline problem in nanopolish_merge (#31)

mateidavid/nanopolish,mateidavid/nanopolish,mateidavid/nanopolish,jts/nanopolish,jts/nanopolish,jts/nanopolish,mateidavid/nanopolish,jts/nanopolish,jts/nanopolish,mateidavid/nanopolish