Specialised Import Lists
 
       If the first entry in an import list begins with !, : or /
       then the list is treated as a series of specifications
       which either add to or delete from the list of names to
       import. They are processed left to right. Specifications
       are in the form:
 
           [!]name         This name only
           [!]:DEFAULT     All names in @EXPORT
           [!]:tag         All names in $EXPORT_TAGS{tag} anonymous list
           [!]/pattern/    All names in @EXPORT and @EXPORT_OK which match

       A leading ! indicates that matching names should be
       deleted from the list of names to import.  If the first
       specification is a deletion it is treated as though
       preceded by :DEFAULT. If you just want to import extra
       names in addition to the default set you will still need
       to include :DEFAULT explicitly.

##</code><code>##

use testpack qw(:DEFAULT &rtine);