[perl6/specs] 7df60d: refine concepts of ?range and +range

[GitHub]

  Branch: refs/heads/master
  Home:   https://github.com/perl6/specs
  Commit: 7df60dbc66bb3ad27c515f41fc1fc0fd9c39b819
      
https://github.com/perl6/specs/commit/7df60dbc66bb3ad27c515f41fc1fc0fd9c39b819
  Author: Larry Wall <la...@wall.org>
  Date:   2012-04-06 (Fri, 06 Apr 2012)

  Changed paths:
    M S03-operators.pod

  Log Message:
  -----------
  refine concepts of ?range and +range