Action 210-22: addressing some xml-proc-profiles comments

I've published an Editors' draft at

  http://www.w3.org/XML/XProc/docs/diff.html
  http://www.w3.org/XML/XProc/docs/xml-proc-profiles.html
  http://www.w3.org/XML/XProc/docs/xml-proc-profiles.xml

Attached is the only section with changes for your review -- don't
bother with the full thing above. . .

ht

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       Henry S. Thompson, School of Informatics, University of Edinburgh
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