Update almost all tests (except co19) to use the new try-catch syntax.

tests/language/map_literal1_negative_test.dart

Index: tests/language/map_literal1_negative_test.dart
diff --git a/tests/language/map_literal1_negative_test.dart b/tests/language/map_literal1_negative_test.dart
index 05ffbe46feb59381e923c4d7c02925380aa1b00c..43da66a004d6ab2e52314309857ad2d717a5a988 100644
--- a/tests/language/map_literal1_negative_test.dart
+++ b/tests/language/map_literal1_negative_test.dart
@@ -8,7 +8,7 @@
 main() {
   try {
     var m = const <String, String>{"a": 0};  // 0 is not a String.
-  } catch (TypeError error) {
+  } on TypeError catch (error) {
     // not a catchable error
   }
 }