Bug#919143: Bug #919143: xorg.conf.5: Some formatting and word corrections in the manual

[Alan Coopersmith]

I've included fixes from this patch in the upstream merge request
https://gitlab.freedesktop.org/xorg/xserver/-/merge_requests/1875

--
        -Alan Coopersmith-                 alan.coopersm...@oracle.com
         Oracle Solaris Engineering - https://blogs.oracle.com/solaris