The pkg-info man page suggest that the only option is a single pkg-name:
pkg info pkg-name
However pkg info actually can take multiple pages, but the behaviours is inconsistent.
If specified with exactly one pkg, it does the equivalent of pkg info -f
# pkg info curl
Name : curl
Version : 7.42.0
If specified with more than one pkg, it does the equivalent of pkg info -E (which is marked as depreciated in the man page).
# pkg info curl pcre
The behaviour should not be dependent on the number of arguments as it makes it difficult to use in scripts.
Maintainer feedback, please!
This is something that needs to be improved