message: The manual find should also be case insensitive.
diff: @@ -1888,7 +1888,8 @@ TEST(StringIndex_Insensitive_Fuzz)
  // Check that all matches in 'col' exist in 'res'
  for (size_t col_ndx = 0; col_ndx < col.size(); col_ndx++) {
  - if (col.get(col_ndx) == needle) {
  + auto str_upper = case_map(col.get(col_ndx), true);
  + if (str_upper == needle_upper) {
  CHECK(res.find_first(col_ndx) != npos);
  }
  }
  