anchor.diff:  %% Note: string:tokens/2 is used in some places where where sequences
   %%       of separator char() are not allowed, but tokens/2 will only
   %%       "see" one separator char().
  -%% Note: contens of quoted-string are not checked
  +%% Note: contents of quoted-string are not checked
   %%       - there is no need to, it should just be passed along
  -%%         acording to RFC 3261
  +%%         according to RFC 3261
   %% Note: SIP/SIPS-URIs are not parsed into sipurl records, this
   %%       has been done to reduce the amount of parsing needed to be
   %%       done and must therefor be done later - if needed
  
positive.code: %%           set_urlstr(Contact, URI)
  %%           Contact = contact record()
  %%           URLstr  = string()
  %%           SipURL  = sipurl record() 
  %% Descrip.: change the sipurl contained in Contact
  %% Returns : contact record()
  %%--------------------------------------------------------------------
  
negative.code: 	_ -> throw({error, test_failed})
      end,
  
      %% test contact-parameters without a value
      io:format("test: parse/1 - 15~n"),
      P15 = [#contact{display_name = none,
  		    urlstr = "sip:example.org",
  		    contact_param = contact_param:to_norm([{"foo", none}, {"lr", "true"}, {"bar", none},
  							   {"baz", none}])
  		   }],
      P15 = parse(["sip:example.org;foo;lr=true;bar;baz"]),
  
      %% print/1
      %%--------------------------------------------------------------------
      %% test "Contact: *"
  