fix inline documentation because of broken ansi representation in iex

Hi,

I stumbled over a representation issue with the ansi doc inside `iex`.

before:

![BAD ANSI](http://i.imgur.com/tAvq7JL.png)

after:

![GOOD ANSI](http://i.imgur.com/ddbkIWS.png)

I also made the information about the `l/1` function shorter. The more precise information you get via `h(l/1)`.