[perl6/specs] a964d4: Fix typo

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/perl6/specs
  Commit: a964d4bd6aa84919a21e0d5c160968e8c31279ab
      
https://github.com/perl6/specs/commit/a964d4bd6aa84919a21e0d5c160968e8c31279ab
  Author: Rob Hoelz <r...@hoelz.ro>
  Date:   2015-06-23 (Tue, 23 Jun 2015)

  Changed paths:
    M S32-setting-library/IO.pod

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