[perl6/specs] bbb0e9: Clarify lack of special meaning of $a,$b in Perl 6

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/perl6/specs
  Commit: bbb0e90f3a67d61cd4be9f7a419d643bd504f72d
      
https://github.com/perl6/specs/commit/bbb0e90f3a67d61cd4be9f7a419d643bd504f72d
  Author: Elizabeth Mattijsen <l...@dijkmat.nl>
  Date:   2015-06-21 (Sun, 21 Jun 2015)

  Changed paths:
    M S28-special-names.pod

  Log Message:
  -----------
  Clarify lack of special meaning of $a,$b in Perl 6