Retain trailing newline in Torperf results.

Fixes #22912.

CHANGELOG.md

@@ -5,6 +5,9 @@
      Apache Commons Compress 1.13, Apache Commons Lang 3.5, Google
      Gson 2.4, JUnit 4.12, Logback 1.1.9, SLF4J 1.7.22, and XZ 1.6.
 
+ * Minor changes
+   - Retain trailing newline in Torperf results.
+
 
 # Changes in version 2.0.0 - 2017-06-28
 

src/main/java/org/torproject/descriptor/impl/TorperfResultImpl.java

@@ -49,7 +49,7 @@ public class TorperfResultImpl extends DescriptorImpl
       } else {
         /* XXX21932 */
         parsedDescriptors.add(new TorperfResultImpl(
-            (typeAnnotation + line).getBytes(StandardCharsets.UTF_8),
+            (typeAnnotation + line + "\n").getBytes(StandardCharsets.UTF_8),
             descriptorFile));
         typeAnnotation = "";
       }