+ask if it was deliberate. If the text output from LilyPond (the
+logfile) changes, the differences will be displayed with a +
+before text added to the logfile and - before any text removed
+from the logfile. This may or may not be suspicious.
+
+There is one test designed to produce output every time the
+regtests are created. @code{test-output-distance.ly} creates
+randomly spaced notes and will always have different output if the
+regtest checker is working.
+
+The official comparison is online, at: