Code viewer generates invalid HTML when authors are not shown

Validating HTML5 validity for [http://127.0.0.1:8080/xwiki/bin/view/Main/?viewer=code] executed with credentials Admin:admin
Warning at 654:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 658:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 662:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 666:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 670:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 674:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 678:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 682:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 686:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 690:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 694:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 698:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 702:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 706:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 710:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 714:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 718:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 722:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 726:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 730:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 734:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 738:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 742:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 746:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 750:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 754:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 758:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 762:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 766:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 770:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 774:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 778:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 782:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 786:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 790:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 794:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 798:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 802:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 806:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 810:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 814:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 818:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 822:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 826:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 830:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 834:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 838:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 842:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 846:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 850:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 854:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 858:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 862:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 866:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 870:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).
Warning at 874:11 A table row was 2 columns wide, which is less than the column count established by the first row (4).