fixes #226 super == and fixes #227 escape \r \f

test/codegen/expect/misc.txt

Index: test/codegen/expect/misc.txt
diff --git a/test/codegen/expect/misc.txt b/test/codegen/expect/misc.txt
index c545765f09ded896db2f7ede0ddfa270150ce3d5..8ae540eec5427548b80bac074c62588d91b2681a 100644
--- a/test/codegen/expect/misc.txt
+++ b/test/codegen/expect/misc.txt
@@ -1 +1,10 @@
 // Messages from compiling misc.dart
+info: line 19, column 27 of test/codegen/misc.dart: [DynamicInvoke] obj.x requires dynamic invoke
+    return obj is Base && obj.x == x && obj.y == y;
+                          ^^^^^
+info: line 19, column 41 of test/codegen/misc.dart: [DynamicInvoke] obj.y requires dynamic invoke
+    return obj is Base && obj.x == x && obj.y == y;
+                                        ^^^^^
+info: line 25, column 30 of test/codegen/misc.dart: [DynamicInvoke] obj.z requires dynamic invoke
+    return obj is Derived && obj.z == z && super == obj;
+                             ^^^^^