docs: def _correct_qualimap_insert_size_histogram(work_dir, samples):
      """ replacing Qualimap insert size histogram with Picard one.
      """
      for s in samples:
          qualimap1_dirname = dirname(s.qualimap_ins_size_hist_fpath).replace('raw_data_qualimapReport', 'raw_data')
          qualimap2_dirname = dirname(s.qualimap_ins_size_hist_fpath)
          if exists(qualimap1_dirname):
              if not exists(qualimap2_dirname):
                  shutil.move(qualimap1_dirname, qualimap2_dirname)
              else:
                  shutil.rmtree(qualimap1_dirname)
          elif not exists(qualimap2_dirname):
              continue  # no data from both Qualimap v.1 and Qualimap v.2
  
          # if qualimap histogram exits and reuse_intermediate, skip
          if verify_file(s.qualimap_ins_size_hist_fpath, silent=True) and tc.reuse_intermediate:
              pass
          else:
              if verify_file(s.picard_ins_size_hist_txt_fpath):
                  with open(s.picard_ins_size_hist_txt_fpath, 'r') as picard_f:
                      one_line_to_stop = False
                      for line in picard_f:
                          if one_line_to_stop:
                              break
                          if line.startswith('## HISTOGRAM'):
                              one_line_to_stop = True
  
                      with file_transaction(work_dir, s.qualimap_ins_size_hist_fpath) as tx:
                          with open(tx, 'w') as qualimap_f:
                              for line in picard_f:
                                  qualimap_f.write(line)