Fix typo

tests/standalone/src/StringStreamTest.dart

Index: tests/standalone/src/StringStreamTest.dart
diff --git a/tests/standalone/src/StringStreamTest.dart b/tests/standalone/src/StringStreamTest.dart
index 21150ecfc8b2593688c293437c1ca019d99cf714..f6d70fb1c5d1f7329da42c867b63591fdd690e1f 100644
--- a/tests/standalone/src/StringStreamTest.dart
+++ b/tests/standalone/src/StringStreamTest.dart
@@ -163,7 +163,7 @@ void testReadLine2() {
       stage++;
       s.close();
     } else if (stage == 3) {
-      // The final \r can not be interpreted as a end of line.
+      // The final \r can now be interpreted as an end of line.
       line = stream.readLine();
       Expect.equals("", line);
       line = stream.readLine();