[perl6/specs] 65be12: Add a note about list operator flattening.

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/perl6/specs
  Commit: 65be12770be696034dd41a363ba3804ea9beab4a
      
https://github.com/perl6/specs/commit/65be12770be696034dd41a363ba3804ea9beab4a
  Author: pmichaud <pmich...@pobox.com>
  Date:   2015-06-23 (Tue, 23 Jun 2015)

  Changed paths:
    M S07-glr-draft.pod

  Log Message:
  -----------
  Add a note about list operator flattening.