docs: public void removeBlockQuotePrefix()
      {
          Line line = this.lines;
          while (line != null)
          {
              if (!line.isEmpty)
              {
                  if (line.value.charAt(line.leading) == '>')
                  {
                      int rem = line.leading + 1;
                      if (line.leading + 1 < line.value.length() && line.value.charAt(line.leading + 1) == ' ')
                      {
                          rem++;
                      }
                      line.value = line.value.substring(rem);
                      line.initLeading();
                  }
              }
              line = line.next;
          }
      }