[perl6/specs] ace089: Fix typo

[email protected] (GitHub)
Newsgroups perl.perl6.language
Message-ID <5595b7bc631cc_40c63fad55ccd2a067774@hookshot-fe6-cp1-prd.iad.github.net.mail> 
  Branch: refs/heads/master
  Home:   https://github.com/perl6/specs
  Commit: ace089e004fee445759fa61cb380b92580e94a81
      https://github.com/perl6/specs/commit/ace089e004fee445759fa61cb380b92580e94a81
  Author: Elizabeth Mattijsen <[email protected]>
  Date:   2015-07-03 (Fri, 03 Jul 2015)

  Changed paths:
    M S99-glossary.pod

  Log Message:
  -----------
  Fix typo
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