   end
 
   @doc """
-  Fetches the value for specific `key`. If `key` does not exist,
-  a `KeyError` is raised.
+  Fetches the value for specific `key`. 
+  
+  If `key` does not exist, a `KeyError` is raised.
 
   ## Examples
 

  Returns the first value associated with `key` in the keyword
  list as well as the keyword list without `key`.

  All duplicated entries are removed. See `pop_first/3` for
  removing only the first entry.

  ## Examples

  end

  @doc """
  Returns all keys from the keyword list. 
  
  Duplicated keys appear duplicated in the final list of keys.

  ## Examples

