Apply automatic rubocop fixes

app/controllers/execution_environments_controller.rb

@@ -1,9 +1,11 @@
+# frozen_string_literal: true
+
 class ExecutionEnvironmentsController < ApplicationController
   include CommonBehavior
 
-  before_action :set_docker_images, only: [:create, :edit, :new, :update]
-  before_action :set_execution_environment, only: MEMBER_ACTIONS + [:execute_command, :shell, :statistics]
-  before_action :set_testing_framework_adapters, only: [:create, :edit, :new, :update]
+  before_action :set_docker_images, only: %i[create edit new update]
+  before_action :set_execution_environment, only: MEMBER_ACTIONS + %i[execute_command shell statistics]
+  before_action :set_testing_framework_adapters, only: %i[create edit new update]
 
   def authorize!
     authorize(@execution_environment || @execution_environments)
@@ -20,17 +22,15 @@ class ExecutionEnvironmentsController < ApplicationController
     destroy_and_respond(object: @execution_environment)
   end
 
-  def edit
-  end
+  def edit; end
 
   def execute_command
     @docker_client = DockerClient.new(execution_environment: @execution_environment)
     render(json: @docker_client.execute_arbitrary_command(params[:command]))
   end
 
-
   def working_time_query
-    """
+    "
       SELECT exercise_id, avg(working_time) as average_time, stddev_samp(extract('epoch' from working_time)) * interval '1 second' as stddev_time
       FROM
         (
@@ -52,11 +52,11 @@ class ExecutionEnvironmentsController < ApplicationController
             GROUP BY exercise_id, user_id, id) AS foo) AS bar
       GROUP BY user_id, exercise_id
     ) AS baz GROUP BY exercise_id;
-    """
+    "
   end
 
   def user_query
-    """
+    "
     SELECT
       id AS exercise_id,
       COUNT(DISTINCT user_id) AS users,
@@ -79,7 +79,7 @@ class ExecutionEnvironmentsController < ApplicationController
        GROUP BY e.id,
                 s.user_id) AS inner_query
     GROUP BY id;
-    """
+    "
   end
 
   def statistics
@@ -87,21 +87,25 @@ class ExecutionEnvironmentsController < ApplicationController
     user_statistics = {}
 
     ApplicationRecord.connection.execute(working_time_query).each do |tuple|
-      working_time_statistics[tuple["exercise_id"].to_i] = tuple
+      working_time_statistics[tuple['exercise_id'].to_i] = tuple
     end
 
     ApplicationRecord.connection.execute(user_query).each do |tuple|
-      user_statistics[tuple["exercise_id"].to_i] = tuple
+      user_statistics[tuple['exercise_id'].to_i] = tuple
     end
 
     render locals: {
       working_time_statistics: working_time_statistics,
-      user_statistics: user_statistics
+      user_statistics: user_statistics,
     }
   end
 
   def execution_environment_params
-    params[:execution_environment].permit(:docker_image, :exposed_ports, :editor_mode, :file_extension, :file_type_id, :help, :indent_size, :memory_limit, :name, :network_enabled, :permitted_execution_time, :pool_size, :run_command, :test_command, :testing_framework).merge(user_id: current_user.id, user_type: current_user.class.name) if params[:execution_environment].present?
+    if params[:execution_environment].present?
+      params[:execution_environment].permit(:docker_image, :exposed_ports, :editor_mode, :file_extension, :file_type_id, :help, :indent_size, :memory_limit, :name, :network_enabled, :permitted_execution_time, :pool_size, :run_command, :test_command, :testing_framework).merge(
+user_id: current_user.id, user_type: current_user.class.name
+)
+    end
   end
   private :execution_environment_params
 
@@ -118,10 +122,10 @@ class ExecutionEnvironmentsController < ApplicationController
   def set_docker_images
     DockerClient.check_availability!
     @docker_images = DockerClient.image_tags.sort
-  rescue DockerClient::Error => error
+  rescue DockerClient::Error => e
     @docker_images = []
-    flash[:warning] = error.message
-    Sentry.capture_exception(error)
+    flash[:warning] = e.message
+    Sentry.capture_exception(e)
   end
   private :set_docker_images
 
@@ -139,8 +143,7 @@ class ExecutionEnvironmentsController < ApplicationController
   end
   private :set_testing_framework_adapters
 
-  def shell
-  end
+  def shell; end
 
   def show
     if @execution_environment.testing_framework?