tests: add missing newline in test_guarantee_title that caused a test failure with the new tap driver
tests: add missing newline in test_guarantee_title that caused a test failure with the new tap driver

https://bugzilla.gnome.org/show_bug.cgi?id=734464

outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker,outofbits/tracker