repl: make the completer use newlines

Fixes the repl.complete() function when terminal is false, since it
is now explicitly looking for a '\n' char.

lib/repl.js

@@ -371,7 +371,7 @@ function ArrayStream() {
   this.run = function(data) {
     var self = this;
     data.forEach(function(line) {
-      self.emit('data', line);
+      self.emit('data', line + '\n');
     });
   }
 }