Tweak rendering of manpage in doc #3139

Job	Run time
Documentation	5m 26s
Client (oldstable, ubuntu-latest)	1m 4s
Code (oldstable)	8m 11s
Client (oldstable, macos-latest)	1m 9s
Code (stable)	8m 2s
Code (tip)	10m 18s
Client (oldstable, windows-latest)	2m 4s
System (stable, cluster, dir)	11m 41s
Client (stable, ubuntu-latest)	1m 11s
Client (stable, macos-latest)	55s
System (stable, cluster, btrfs)	11m 57s
Client (stable, windows-latest)	3m 1s
System (stable, cluster, lvm)	12m 41s
System (stable, cluster, zfs)	12m 30s
System (stable, cluster, ceph)	15m 51s
System (stable, cluster, random)	12m 23s
System (stable, standalone, dir)	22m 43s
System (stable, standalone, btrfs)	23m 27s
System (stable, standalone, lvm)	40m 49s
System (stable, standalone, zfs)	38m 53s
System (stable, standalone, ceph)	1h 14m 29s
System (stable, standalone, random)	22m 50s
System (oldstable, cluster, dir)	11m 34s
System (oldstable, standalone, dir)	22m 28s
System (tip, cluster, dir)	16m 2s
System (tip, standalone, dir)	25m 15s
	6h 56m 54s

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