Correct some erreoneous information about ruby execption handling.

[samg]

begin; rescue Exception; end

is not the same as

begin: rescue; end # this rescues from StandardError, not Exception

This former is a bad practice which results in processes that don't
respond to kill and other signals. It's rarely what's intended.

Try this one for fun:

begin
  # calls to exit and kill signals will be caught (except kill -9)
  exit
rescue Exception
  puts "you didn't really want to exit, right?"
  # exception handling
end 

[bbatsov]

Thanks!