Remove leftover spaces

Signed-off-by: José Valim <[email protected]>

Author: José Valim

lib/elixir/lib/application.ex

@@ -405,7 +405,7 @@ defmodule Application do
   If the configuration parameter does not exist, the function returns the
   `default` value.
 
-  ## Examples 
+  ## Examples
 
   `get_env/3` is commonly used to read the configuration of your OTP applications.
   Since Mix configurations are commonly used to configure applications, we will use