Mark test output from repro

docker/repro

@@ -73,7 +73,13 @@ parse() {
 if [ "$whichexps" = "test" ]; then
     echo "Running test experiment..."
     run 16 1us 100gbit 2
+    echo
+    echo "# Test output"
+    echo
     parse read_1us_100gbit_2.out${LOGSUFFIX}
+    echo
+    echo "# End test output"
+    echo
     exit
 fi