[perl6/specs] b99490: Document COERCE

[GitHub]

  Branch: refs/heads/coerce-multi
  Home:   https://github.com/perl6/specs
  Commit: b994904557c769cb00edd4223d1e8628b0ac591f
      
https://github.com/perl6/specs/commit/b994904557c769cb00edd4223d1e8628b0ac591f
  Author: Rob Hoelz <r...@hoelz.ro>
  Date:   2015-01-28 (Wed, 28 Jan 2015)

  Changed paths:
    M S13-overloading.pod

  Log Message:
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  Document COERCE