Reverse the spec since ipsum should contain text.

We want to test to make sure that Lorem.ipsum is actually returning some
lorem text that we can use from other code. The test used to be doing
the opposite, which means the ipsum method wasn't very helpful.
Return the lorem text.

Instead of using `puts`, which prints the text out to the screen,
we return a string containing the text to whatever code called the
Lorem.ipsum method, so that the other code can use it.
Print the lorem text using `puts`.

Now that the Lorem.ipsum method returns a string containing the text,
we need to print it out inside the CLI method. So we do that.
Add a spec for the contents of the lorem text.

Now that the Lorem.ipsum method is returning a string containing
the text, we test to make sure that the first word of that text
is actually there, implying that we are getting the right text.