Does anyone know why the symbolic-actual character pairs in 
  the *entities[] in swish.h are followed by null entries `"",' ?


__Ian

char *entities[] = {
  "", "&#32", " ", "", "&#33", "!", "&quot", "&#34", "\"", "", "&#35", "#",
  "", "&#36", "$", "", "&#37", "%", "&amp", "&#38", "&", "", "&#39", "'",
  "", "&#43", "+", "", "&#44", ",", "", "&#45", "-", "", "&#46", ".",
  "", "&#47", "/", "", "&#48", "0", "", "&#49", "1", "", "&#50", "2",

   ... [etc] ...