Fix `Style/Lambda` cop (#28378)

.rubocop_todo.yml

@@ -386,14 +386,6 @@ Style/InverseMethods:
     - 'app/services/update_account_service.rb'
     - 'spec/controllers/activitypub/replies_controller_spec.rb'
 
-# This cop supports safe autocorrection (--autocorrect).
-# Configuration parameters: EnforcedStyle.
-# SupportedStyles: line_count_dependent, lambda, literal
-Style/Lambda:
-  Exclude:
-    - 'config/initializers/simple_form.rb'
-    - 'config/routes.rb'
-
 # This cop supports unsafe autocorrection (--autocorrect-all).
 Style/MapToHash:
   Exclude:

config/initializers/simple_form.rb

@@ -164,7 +164,7 @@ SimpleForm.setup do |config|
   # config.item_wrapper_class = nil
 
   # How the label text should be generated altogether with the required text.
-  config.label_text = lambda { |label, required, _explicit_label| "#{label} #{required}" }
+  config.label_text = ->(label, required, _explicit_label) { "#{label} #{required}" }
 
   # You can define the class to use on all labels. Default is nil.
   # config.label_class = nil

config/routes.rb

@@ -51,7 +51,7 @@ Rails.application.routes.draw do
 
   get 'health', to: 'health#show'
 
-  authenticate :user, lambda { |u| u.role&.can?(:view_devops) } do
+  authenticate :user, ->(user) { user.role&.can?(:view_devops) } do
     mount Sidekiq::Web, at: 'sidekiq', as: :sidekiq
     mount PgHero::Engine, at: 'pghero', as: :pghero
   end
@@ -105,10 +105,10 @@ Rails.application.routes.draw do
   }
 
   # rubocop:disable Style/FormatStringToken - those do not go through the usual formatting functions and are not safe to correct
-  get '/users/:username', to: redirect_with_vary('/@%{username}'), constraints: lambda { |req| req.format.nil? || req.format.html? }
+  get '/users/:username', to: redirect_with_vary('/@%{username}'), constraints: ->(req) { req.format.nil? || req.format.html? }
-  get '/users/:username/following', to: redirect_with_vary('/@%{username}/following'), constraints: lambda { |req| req.format.nil? || req.format.html? }
+  get '/users/:username/following', to: redirect_with_vary('/@%{username}/following'), constraints: ->(req) { req.format.nil? || req.format.html? }
-  get '/users/:username/followers', to: redirect_with_vary('/@%{username}/followers'), constraints: lambda { |req| req.format.nil? || req.format.html? }
+  get '/users/:username/followers', to: redirect_with_vary('/@%{username}/followers'), constraints: ->(req) { req.format.nil? || req.format.html? }
-  get '/users/:username/statuses/:id', to: redirect_with_vary('/@%{username}/%{id}'), constraints: lambda { |req| req.format.nil? || req.format.html? }
+  get '/users/:username/statuses/:id', to: redirect_with_vary('/@%{username}/%{id}'), constraints: ->(req) { req.format.nil? || req.format.html? }
   # rubocop:enable Style/FormatStringToken
 
   get '/authorize_follow', to: redirect { |_, request| "/authorize_interaction?#{request.params.to_query}" }