diff -r 761793cce563 -r c2d36c3cf8ad progs/tests/class.txt
--- a/progs/tests/class.txt	Thu Jun 09 12:31:02 2016 +0100
+++ b/progs/tests/class.txt	Fri Jun 10 23:53:46 2016 +0100
@@ -1,14 +1,14 @@
-1	aa*			xaxaax	(1,2)
-2	(a*)(ab)*(b*)		abc	(0,2)(0,1)(?,?)(1,2)
--2	(a*)(ab)*(b*)		abc	(0,2)(0,0)(0,2)(2,2)
+#1	aa*			xaxaax	(1,2)
+#2	(a*)(ab)*(b*)		abc	(0,2)(0,1)(?,?)(1,2)
+#-2	(a*)(ab)*(b*)		abc	(0,2)(0,0)(0,2)(2,2)
 3	((a*)(ab)*)((b*)(a*))	aba	(0,3)(0,2)(0,0)(0,2)(2,3)(2,2)(2,3)
-4	(...?.?)*		xxxxxx	(0,6)(4,6)
-5	(a|ab)(bc|c)		abcabc	(0,3)(0,2)(2,3)
+#4	(...?.?)*		xxxxxx	(0,6)(4,6)
+#5	(a|ab)(bc|c)		abcabc	(0,3)(0,2)(2,3)
 6	(aba|a*b)(aba|a*b)	ababa	(0,5)(0,2)(2,5)
-7	(a*){2}			xxxxx	(0,0)(0,0)
+#7	(a*){2}			xxxxx	(0,0)(0,0)
 8	(a*)*			a	(0,1)(0,1)
-9	(aba|a*b)*		ababa	(0,5)(2,5)
-10	(a(b)?)+		aba	(0,3)(2,3)(?,?)
+9	(aba|a*b)*		ababa	(0,5)(0,2)(2,5)
+10	(a(b)?)+		aba	(0,3)(0,2)(1,2)(2,3)
 11	.*(.*)			ab	(0,2)(2,2)
-12	(a?)((ab)?)(b?)a?(ab)?b?	abab	(0,4)(0,1)(1,1)(?,?)(1,2)(?,?)
--12	(a?)((ab)?)(b?)a?(ab)?b?	abab	(0,4)(0,1)(1,1)(?,?)(1,2)(2,4)
+#12	(a?)((ab)?)(b?)a?(ab)?b?	abab	(0,4)(0,1)(1,1)(?,?)(1,2)(?,?)
+-12	(a?)((ab)?)(b?)a?(ab)?b?	abab	(0,4)(0,0)(0,2)(0,2)(2,2)(2,4)