Improve LocalJumpError Tests

test/t/localjumperror.rb

@@ -1,13 +1,12 @@
 ##
 # LocalJumpError ISO Test
 
-assert('LocalJumoError', '15.2.25') do
-  begin
+assert('LocalJumpError', '15.2.25') do
+  assert_equal LocalJumpError.class, Class
+  assert_raise LocalJumpError do
     # this will cause an exception due to the wrong location
     retry
-  rescue => e1
   end
-  LocalJumpError.class == Class and e1.class == LocalJumpError
 end
 
 # TODO 15.2.25.2.1 LocalJumpError#exit_value