I find the output unclean without it. Compare the following:

> Testing the DirectoryParser filter method ... Serving '/the/directory/path/mozdownload/tests' at 127.0.0.1:8080

vs.

> Testing the DirectoryParser filter method ...
> Serving '/the/directory/path/mozdownload/tests' at 127.0.0.1:8080

As the top is all one line, the line break is at an odd place. It's a preference, feel free to disagree and I will grudgingly change it ;)