chore: mix format

Author: puzza007

lib/test_doubles/mock_httpoison.ex

@@ -144,7 +144,7 @@ defmodule Vaultex.Test.TestDoubles.MockHTTPoison do
         {:error, %HTTPoison.Error{id: nil, reason: :econnrefused}}
 
       key |> String.contains?("ssl") ->
-        {:error, %HTTPoison.Error{id: nil, reason: {:tls_alert, 'unknown ca'}}}
+        {:error, %HTTPoison.Error{id: nil, reason: {:tls_alert, ~c"unknown ca"}}}
 
       :else ->
         {:ok, %{body: Jason.encode(%{errors: ["Not Authenticated"]}, [])}}

test/vaultex_test.exs

@@ -113,7 +113,10 @@ defmodule VaultexTest do
   test "Authentication of self signed ssl causes an exception" do
     assert Vaultex.Client.auth(:token, {"ssl"}) ==
              {:error,
-              ["Bad response from vault [http://localhost:8200/v1/]", {:tls_alert, 'unknown ca'}]}
+              [
+                "Bad response from vault [http://localhost:8200/v1/]",
+                {:tls_alert, ~c"unknown ca"}
+              ]}
   end
 
   test "Authentication of arbitrary method and credentials" do