docs: public static String convertEOL(String input, EOLType type) {
          if (null == input || 0 == input.length()) {
              return input;
          }
          // Convert line endings to Unix LF,
          // which also sets up the string for other conversions
          input = input.replace("\r\n","\n");
          input = input.replace("\r","\n");
          switch (type) {
              case CR:
              case Mac:
                  // Convert line endings to CR
                  input = input.replace("\n", "\r");
                  break;
              case CRLF:
              case Windows:
                  // Convert line endings to Windows CR/LF
                  input = input.replace("\n", "\r\n");
                  break;
              default:
              case LF:
              case Unix:
                  // Conversion already completed
                  return input;
              case LFCR:
                  // Convert line endings to LF/CR
                  input = input.replace("\n", "\n\r");
                  break;
          }
          return input;
      }