[perl6/specs] 64c489: Some clarification on --include / -I

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/perl6/specs
  Commit: 64c4899fa09275b3621bc509b8d2b859d6662b1c
      
https://github.com/perl6/specs/commit/64c4899fa09275b3621bc509b8d2b859d6662b1c
  Author: Elizabeth Mattijsen <l...@dijkmat.nl>
  Date:   2013-11-18 (Mon, 18 Nov 2013)

  Changed paths:
    M S19-commandline.pod

  Log Message:
  -----------
  Some clarification on --include / -I