cg-help question

cg-help has the following in it

print_command_listing()
{
         for command in "$@"; do
                 [ -f "$command" -a ! -L "$command" ] || continue
                 cmdname=$(basename $command)
...
}

I was wondering what the  [ -f "$command" -o ! -L "$command" ] is  
trying to test for.  In my install the cg-commands are actually  
symlinks.  And this test breaks cg-help from reporting the command  
list properly.

thanks

- kumar