It seems https://www.kernel.org/doc/Documentation/filesystems/ext4.txt has the same issue?!
- Bug#867895: e2fsprogs: man ext4: it seems you document "... Askar Safin
- Bug#867895: e2fsprogs: man ext4: it seems you document ... Theodore Ts'o
- Bug#867895: e2fsprogs: man ext4: it seems you document ... Askar Safin