No return carriage return at several message ends.

[jcandan]

Problem:

Several message endings do not include a carriage return. This causes the message to line up with the command line prompt like so:

$ php index.php matches create:controller pages

Pages Controller already exists in the application/controllers directory. $ 

Fixing this should result in a cleaner representation of messages and the terminal prompt, like so:

$ php index.php matches create:controller pages

Pages Controller already exists in the application/controllers directory. 
$ 

Proposed resolution

Add the provided $this->_ret to the end of messages where this is missing.