[Perl/perl5] 9bcf18: io/open.t - add error number to error string

[Yves Orton via perl5-changes]

  Branch: refs/heads/yves/open_stdio_hpux_test_issue
  Home:   https://github.com/Perl/perl5
  Commit: 9bcf18ec0b24690c42398c414f45ff731c893dcc
      
https://github.com/Perl/perl5/commit/9bcf18ec0b24690c42398c414f45ff731c893dcc
  Author: Yves Orton <demer...@gmail.com>
  Date:   2023-03-31 (Fri, 31 Mar 2023)

  Changed paths:
    M t/io/open.t

  Log Message:
  -----------
  io/open.t - add error number to error string