[perl6/specs] 86d7dd: document .pairup and List.invert

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/perl6/specs
  Commit: 86d7dd52fdf6a6249362f4e179a99b9a8ae38925
      
https://github.com/perl6/specs/commit/86d7dd52fdf6a6249362f4e179a99b9a8ae38925
  Author: TimToady <la...@wall.org>
  Date:   2015-02-26 (Thu, 26 Feb 2015)

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

  Log Message:
  -----------
  document .pairup and List.invert