"/n" is removed from error output

[welearnednothing]

It's meant to split on line breaks, this is due to a small typo.

Steps to reproduce

1. Create the following Jakefile

task('npm', function() {
  var e = jake.exec('npm install kaboom!', {printStdout: true},  function() {
    complete();
  });
}, {async: true});

1. Run jake npm
2. See the following output:

jake aborted.
ode" "/usr/local/bin
pm" "install" "kaboom!"
npm ERR! node v5.1.0
(See full trace by running task with --trace)

Expected results

The output should be as follows:

jake aborted.
npm ERR! Darwin 15.0.0
npm ERR! argv "/usr/local/bin/node" "/usr/local/bin/npm" "install" "kaboom!"
npm ERR! node v5.1.0
(See full trace by running task with --trace)

[mde]

Excellent!