Fix an issue of missing adapter trimming due to tandem repeat near read start.

  for (int si = 0; si < error_threshold_for_merging + 1; ++si) {

    size_t seed_start_position =

        negative_read2.find(read1 + si * seed_length, 0, seed_length);

    while (seed_start_position != std::string::npos &&

           (int)(read2_length - seed_start_position + seed_length * si) >=

    while (seed_start_position != std::string::npos) {

      // The seed hit does not allow enough match based on the length

      //   before the hit

      if ( !((int)(read2_length - seed_start_position + seed_length * si) >=

               min_overlap_length &&

           seed_start_position >= (size_t)(si * seed_length)) {

           seed_start_position >= (size_t)(si * seed_length) )) {

        seed_start_position = negative_read2.find(

            read1 + si * seed_length, seed_start_position + 1, seed_length);

        continue;

      }

      bool can_merge = true;

      int num_errors = 0;

      // The bases before the seed.