const char *z,            /* Full original help text */
  Blob *pOut,               /* Write simplified help text here */
  const char *zTopic,       /* TOPIC */
  const char *zSubtopic     /* SUBTOPIC */
){
  Blob in, line, subsection;
  int n = 0;
  size_t nSub;    /* Length of zSubtopic */
  char *zQTop = re_quote(zTopic);
  char *zQSub = re_quote(zSubtopic);
  char *zPattern = mprintf("> fossil %s .*\\b%s\\b", zQTop, zQSub);
  ReCompiled *pRe = 0;

  fossil_free(zQTop);
  fossil_free(zQSub);

  }


  /* If no subtopic name zSubtopic if found, try to match any text.
  */
  blob_rewind(&in);
  blob_init(&subsection, 0, 0);
  nSub = (int)strlen(zSubtopic);
  while( blob_line(&in, &line) ){
    size_t len = blob_strlen(&line);
    if( memmem(blob_buffer(&line), len, zSubtopic, nSub)!=0 ){
      if( blob_strlen(&subsection) && blob_buffer(&line)[0]!='>' ){
        blob_appendb(pOut, &subsection);
        blob_reset(&subsection);
      }
      blob_appendb(pOut, &line);
      n++;
    }else if( len>9 && strncmp(blob_buffer(&line),"> fossil ",9)==0 ){