Fix benchmark.regex-dna

extra/benchmark/regex-dna/regex-dna-tests.factor

@@ -4,7 +4,7 @@ IN: benchmark.regex-dna.tests
 
 [ t ] [
     "resource:extra/benchmark/regex-dna/regex-dna-test-in.txt"
-    [ regex-dna ] with-string-writer string-lines
+    [ regex-dna ] with-string-writer <string-reader> lines
     "resource:extra/benchmark/regex-dna/regex-dna-test-out.txt"
     ascii file-lines =
 ] unit-test