code: FormatStep startNewOrBlock() {
  
          if (this.orMarker) {
              throw new IllegalStateException("Cannot start or-block twice.");
          }
  
          return new FormatStep(
              this.processor,
              this.level,
              this.section,
              this.sectionalAttrs,
              null, // called before build of formatter
              this.reserved,
              this.padLeft,
              this.padRight,
              true,
              -1
          );
  
      }
docs: <p>Startet einen neuen oder-Block. </p>
  
  @return  updated format step
  @throws  IllegalStateException if a new or-block was already started
  @since   3.14/4.11