Doc fixes

Author: José Valim

lib/elixir/lib/kernel.ex

@@ -27,7 +27,7 @@ defmodule Kernel do
   If you don't want to import a function or macro from `Kernel`, use the `:except`
   option and then list the function/macro by arity:
 
-        import Kernel, except: [if: 2, unless: 2]
+      import Kernel, except: [if: 2, unless: 2]
 
   See `Kernel.SpecialForms.import/2` for more information on importing.
 

lib/elixir/lib/tuple.ex

@@ -6,7 +6,7 @@ defmodule Tuple do
 
     * `elem/2` - access a tuple by index
     * `put_elem/3` - insert a value into a tuple by index
-    * `tuple_size/3` - get the number of elements in a tuple
+    * `tuple_size/1` - get the number of elements in a tuple
     
   Tuples are intended as fixed-size containers for multiple elements.
   To manipulate a collection of elements, use a list instead. `Enum`