[perl6/specs] 3373e7: fix typo

[email protected] (GitHub)
Newsgroups perl.perl6.language
Message-ID <55f70c26caa9c_770c3f93fdc9f2b8474e7@hookshot-fe2-cp1-prd.iad.github.net.mail> 
  Branch: refs/heads/master
  Home:   https://github.com/perl6/specs
  Commit: 3373e7261ace0f719c155bfc0f86668130ebe42a
      https://github.com/perl6/specs/commit/3373e7261ace0f719c155bfc0f86668130ebe42a
  Author: Lucien Grondin <[email protected]>
  Date:   2015-09-14 (Mon, 14 Sep 2015)

  Changed paths:
    M S07-lists.pod

  Log Message:
  -----------
  fix typo
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