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/user_live/index_test.exs

@@ -116,7 +116,8 @@ defmodule MvWeb.UserLive.IndexTest do
   end
 
   describe "delete functionality" do
-    # Delete is only on user show page (Danger zone), not on index (per CODE_GUIDELINES: at most one UI smoke test for delete)
+    # Delete is only on user show page (Danger zone), not on index
+    # (per CODE_GUIDELINES: at most one UI smoke test for delete).
     test "can delete a user from show page", %{conn: conn} do
       user = create_test_user(%{email: "delete-me@example.com"})
       conn = conn_with_oidc_user(conn)