Begas, You sent me a patch to address this and it's fixed upstream, landing in Linus's tree after 5.19 release during the current merge window. It's cc'ed to stable@xxxxxxxxxx, so it's not necessary for you to send it to stable@ as a separate patch. This upstream commit is 442ec1e5bb7c ("Documentation: ext4: fix cell spacing of table heading on blockmap table"). - Ted