anchor.diff:  						      (vector (t 6 11) (t 51 56))))
   		      (make-instance 'segment-term-vector
   				     :field "field2"
  -				     :terms (vector "word3" "word4")
  +				     :terms (vector "word3" "woord4")
   				     :term-frequencies (vector 1 5)
   				     :positions (vector (vector 8)
   							(vector 2 9 11 34 56))
  
positive.code: 		    (test term-vector-io-add-documents-7 (aref (aref (offsets tv) 0) 0) (t 0 5) #'term-vector-offset-info=)
  		    (test term-vector-io-add-documents-8 (aref (aref (offsets tv) 0) 1) (t 34 39) #'term-vector-offset-info=)
  		    (test term-vector-io-add-documents-9 (aref (aref (offsets tv) 0) 2) (t 45 50) #'term-vector-offset-info=)
  		    (test term-vector-io-add-documents-10 (aref (terms tv) 1) "word2" #'string=)
  		    (test term-vector-io-add-documents-11 (aref (term-frequencies tv) 1) 2)
  		    (test term-vector-io-add-documents-12 (aref (aref (positions tv) 1) 0) 2)
  		    (test term-vector-io-add-documents-13 (aref (aref (positions tv) 1) 1) 9)
  
negative.code: 		     (list
  		      (make-instance 'segment-term-vector
  				     :field "field1"
  				     :terms (vector "word1" "woord2")
  				     :term-frequencies (vector 3 2)
  				     :positions (vector (vector 1 5 8)
  							(vector 2 9))
  