class Object

def `(command) #:nodoc:

:nodoc:
Unix on the former but not the latter.
spawned shell prints a message to stderr and sets $?. We emulate
On win32 `nonexistent_command` raises Errno::ENOENT; on Unix, the
Makes backticks behave (somewhat more) similarly on all platforms. 
def `(command) #:nodoc:
  super
rescue Errno::ENOENT => e
  STDERR.puts "#$0: #{e}"
end