"Similar" can be a bit vague; I thought `mount -a -t nfs' would mount all NFS shares except those already mounted.
This might be just be, but a little emphasis makes it even clearer that this is not the case. Feedback? OK? Index: mount.8 =================================================================== RCS file: /cvs/src/sbin/mount/mount.8,v retrieving revision 1.89 diff -u -p -r1.89 mount.8 --- mount.8 18 Jan 2018 08:57:12 -0000 1.89 +++ mount.8 14 Sep 2018 12:04:19 -0000 @@ -109,7 +109,7 @@ or .Dq net options are specified. .It Fl a -Similar to the +Same as the .Fl A flag, except that if a file system (other than the root file system) appears to be already mounted,