ActiveSupport overrides `` Kernel#` `` so that it would not raise
`Errno::ENOENT` but return `nil` instead (due to the last statement
`STDERR.puts` returning nil) if a given command were not found.
Because of this, you cannot safely say somthing like
`` `command`.chomp `` when ActiveSupport is loaded.

It turns out that this is an outdated monkey patch for Windows
platforms to emulate Unix behavior on an ancient version of Ruby, and
it should be removed by now.