Fix Credo Readability (strict)

- Max line length, implicit try, alias order, zero-arity defs
- String sigils, long comments split; redundant blank lines fixed

test/mv_web/controllers/auth_controller_test.exs

@@ -199,7 +199,8 @@ defmodule MvWeb.AuthControllerTest do
 
     assert to =~ "/auth/user/password/sign_in_with_token"
 
-    # After login, user is redirected to /auth/user/password/sign_in_with_token. Session handling for protected routes should be tested in integration or E2E tests.
+    # After login, user is redirected to /auth/user/password/sign_in_with_token.
+    # Session handling for protected routes should be tested in integration or E2E tests.
   end
 
   # Edge cases