[comp.lang.perl] op.mkdir fails under AIX 3.1 in test 3

clarke@arnor.uucp (11/15/90)

The op.mkdir reports an error under AIX 3.1 because the message that is 
being tested for is slightly different.  If you change /exists/ to
/exist/ then it passes the test.  The AIX message is "Do not specify an
existing file." while other unix's report "File exists".