That is a possibility but when I view it with hexl-mode in emacs with the original line commented out and my retyped first line I don't see the difference:

00000000: 2370 6163 6b61 6765 2054 6573 743a 3a4e  #package Test::N
00000010: 6f57 6172 6e69 6e67 733b 0a70 6163 6b61  oWarnings;.packa
00000020: 6765 2054 6573 743a 3a4e 6f57 6172 6e69  ge Test::NoWarni
00000030: 6e67 733b 0a0a 7573 6520 352e 3030 363b  ngs;..use 5.006;
00000040: 0a75 7365 2073 7472 6963 743b 0a75 7365  .use strict;.use
00000050: 2077 6172 6e69 6e67 733b 0a75 7365 2043   warnings;.use C
00000060: 6172 7020 2020 2020 2020 2020 2020 2020  arp

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In reply to Re^7: Useless use of a constant (ict) in void context by mje
in thread Useless use of a constant (ict) in void context by mje

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