code: public PrettyTime withWeeksToDays() {
  
          if (this.weekToDays) {
              return this;
          }
  
          return new PrettyTime(
              this.locale,
              this.refClock,
              this.zeroDigit,
              this.minusSign,
              this.emptyUnit,
              true,
              this.shortStyle,
              this.stdListSeparator,
              this.endListSeparator);
  
      }
docs: /*[deutsch]
  <p>Legt fest, da&szlig; Wochen immer zu Tagen normalisiert werden. </p>
  
  @return  changed copy of this instance
  @since   2.0