Added test case

re_test.go

@@ -21,8 +21,9 @@ var reTests = []struct {
 	{"ab*", "abb", []matchIndex{{0, 3}}},
 	{"(abc)*", "abcabcabc", []matchIndex{{0, 9}}},
 	{"((abc)|(def))*", "abcdef", []matchIndex{{0, 6}}},
-	{"(abc)*|(def)*", "abcdef", []matchIndex{{0, 3}, {3, 6}}},
+	{"(abc)*|(def)*", "abcdef", []matchIndex{{0, 3}, {3, 3}, {3, 6}, {6, 6}}},
 	{"b*a*a", "bba", []matchIndex{{0, 3}}},
+	{"(ab)+", "ababddd", []matchIndex{{0, 2}, {2, 4}}},
 }
 
 func TestFindAllMatches(t *testing.T) {