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/plugs/check_page_permission_test.exs

@@ -4,8 +4,8 @@ defmodule MvWeb.Plugs.CheckPagePermissionTest do
   """
   use MvWeb.ConnCase, async: true
 
-  alias MvWeb.Plugs.CheckPagePermission
   alias Mv.Fixtures
+  alias MvWeb.Plugs.CheckPagePermission
 
   defp conn_with_user(path, user) do
     build_conn(:get, path)
@@ -46,21 +46,21 @@ defmodule MvWeb.Plugs.CheckPagePermissionTest do
   end
 
   describe "dynamic routes" do
-    test "user with \"/members/:id\" permission can access \"/members/123\"" do
+    test ~s(user with "/members/:id" permission can access "/members/123") do
       user = Fixtures.user_with_role_fixture("read_only")
       conn = conn_with_user("/members/123", user) |> CheckPagePermission.call([])
 
       refute conn.halted
     end
 
-    test "user with \"/members/:id/edit\" permission can access \"/members/456/edit\"" do
+    test ~s(user with "/members/:id/edit" permission can access "/members/456/edit") do
       user = Fixtures.user_with_role_fixture("normal_user")
       conn = conn_with_user("/members/456/edit", user) |> CheckPagePermission.call([])
 
       refute conn.halted
     end
 
-    test "user with only \"/members/:id\" cannot access \"/members/123/edit\"" do
+    test ~s(user with only "/members/:id" cannot access "/members/123/edit") do
       user = Fixtures.user_with_role_fixture("read_only")
       conn = conn_with_user("/members/123/edit", user) |> CheckPagePermission.call([])
 
@@ -456,7 +456,8 @@ defmodule MvWeb.Plugs.CheckPagePermissionTest do
       assert conn.status == 200
     end
 
-    # Full-router test: session may not preserve member_id; plug logic covered by unit test "own_data user with linked member can access /members/:id/edit (plug direct call)"
+    # Full-router test: session may not preserve member_id; plug logic covered by unit test
+    # "own_data user with linked member can access /members/:id/edit (plug direct call)".
     @tag role: :member
     @tag :skip
     test "GET /members/:id/edit (linked member edit) returns 200 when user has linked member", %{
@@ -512,7 +513,8 @@ defmodule MvWeb.Plugs.CheckPagePermissionTest do
       assert conn.status == 200
     end
 
-    # Skipped: MemberLive.Show requires membership fee cycle data; plug allows access (page loads then LiveView may error).
+    # Skipped: MemberLive.Show requires membership fee cycle data; plug allows access
+    # (page loads then LiveView may error).
     @tag role: :member
     @tag :skip
     test "GET /members/:id for linked member returns 200", %{conn: conn, current_user: user} do