message: Don't add separator after last element in merge()
diff: @@ -117,6 +117,7 @@ void merge(const vector<std::basic_string<CharType> > &in, std::basic_string<Cha
  for(size_t i = 0; i < in.size(); i++)
  {
  out += in[i];
  + if(i + 1 < in.size())
  out += sep;
  }
  }
  