-# xml_file_ids. There are 2 errors for each violation, so we expect 2*22
-# occurrences of the string 'ERROR'.
+# xml_file_ids. There are 2 errors for each violation, so we expect
+# (twice the number of files) occurrences of the string 'ERROR'. Oh
+# and we subtract 2 because 2 of the files are supposed to fail. I
+# know, sorry.