fix formatting (#553)

Author: bryanhuntesl

Diff for: lib/postgrex.ex

@@ -156,12 +156,12 @@ defmodule Postgrex do
       {:ok, #PID<0.69.0>}
       
   ## SSL client authentication 
-  
+
   When connecting to CockroachDB instances running in secure mode it is idiomatic to use 
   client SSL certificate authentication. 
-  
+
   An example of Repository configuration:
-  
+
       config :app, App.Repo,
         ssl: String.to_existing_atom(System.get_env("DB_SSL_ENABLED", "true")),
         ssl_opts: [