NFS /etc/exports syntax

There appear to be some inconsistencies in exports(5) man page, or at
least a couple things which have me wondering a bit.  :-)

In particular I'm looking at the use of "=" (or not) between some flags
and their args.

E.g. the man page text has descriptions like:

  The third case is specified
  by the flag -network=netname[/prefixlength] and optionally -mask=netmask.

but down in EXAMPLES the "=" is not used with those flags, like so:

  /cdrom -alldirs,quiet,ro -network 192.168.33.0 -mask 255.255.255.0

I've been using -network=1.2.3.4/24 syntax in my own exports and it
seems to do the right thing, fwiw.

Others like -maproot seem to more consistently use "=" in the man page,
and I don't see instances with " " instead; I'm guessing it would work
that way too, but haven't tried it.

In general, are exports flags intended to work with either "=" or " "
between the flag and its arg?

As an aside, the 'zfs set sharenfs' syntax examples from Handbook seem
to use the "=" between flags and their args pretty consistently.

Different but related, is there a syntax rule for "chaining" flags
together after a leading "-"?  E.g. is something like this valid:

  /foo -maproot=root,ro,alldirs -network=1.2.3.4/24

From a readability standpoint, this seems clearer to me:
  
  /foo -maproot=root -ro -alldirs -network=1.2.3.4/24

but I'm curious if there is a formal syntax definition for this stuff.

Thanks,
sr.