Apply suggestions from code review

Co-authored-by: Michael B. Jones <[email protected]>

openid-federation-1_0.xml

@@ -4366,7 +4366,14 @@ Host: openid.sunet.se
      "trust_mark":
        "eyJ0eXAiOiJ0cnVzdC1tYXJrK2p3dCIsImFsZyI6IlJTMjU2Iiwia2lkIjoiOH
         hzdUtXaVZmd1NnSG9mMVRlNE9VZGN5NHE3ZEpyS2ZGUmxPNXhoSElhMCJ9.
-        ..."
+        eyJpc3MiOiJodHRwczovL3d3dy5hZ2lkLmdvdi5pdCIsInN1YiI6Imh0dHBzOi
+        8vb3AuZXhhbXBsZS5pdC9zcGlkLyIsImlhdCI6MTU3OTYyMTE2MCwidHJ1c3Rf
+        bWFya19pZCI6Imh0dHBzOi8vd3d3LnNwaWQuZ292Lml0L2NlcnRpZmljYXRpb2
+        4vb3AvIiwibG9nb191cmkiOiJodHRwczovL3d3dy5hZ2lkLmdvdi5pdC90aGVt
+        ZXMvY3VzdG9tL2FnaWQvbG9nby5zdmciLCJyZWYiOiJodHRwczovL2RvY3MuaX
+        RhbGlhLml0L2l0YWxpYS9zcGlkL3NwaWQtcmVnb2xlLXRlY25pY2hlLW9pZGMv
+        aXQvc3RhYmlsZS9pbmRleC5odG1sIn0.
+        xyz-PDQ_..."
     }
   ],
   "trust_chain" : [
@@ -10059,8 +10066,8 @@ Host: op.umu.se
 	  <t>
 	    Fixed #162: Trust Mark claim <spanx style="verb">id</spanx> 
       renamed to <spanx style="verb">trust_mark_id</spanx>.
-      Other Trust Mark JWT header parameter typ values can be used if
-      permitted by trust frameworks.
+      Other more specific Trust Mark JWT <spanx style="verb">typ</spanx> header parameter values
+      can be used if defined by trust frameworks in use and understood by the implementation.
 	  </t>
 	</list>
       </t>