Apply automatic rubocop fixes

app/models/code_ocean/file.rb

@@ -7,7 +7,7 @@ module CodeOcean
   class FileNameValidator < ActiveModel::Validator
     def validate(record)
       existing_files = File.where(name: record.name, path: record.path, file_type_id: record.file_type_id,
-                                  context_id: record.context_id, context_type: record.context_type).to_a
+        context_id: record.context_id, context_type: record.context_type).to_a
       if !existing_files.empty? && (!record.context.is_a?(Exercise) || record.context.new_record?)
         record.errors[:base] << 'Duplicate'
       end

app/models/exercise.rb

@@ -500,14 +500,14 @@ class Exercise < ApplicationRecord
       feedback_message_nodes = task_node.xpath('p:tests/p:test/p:test-configuration/c:feedback-message/text()')
       files.build({
         name: file_name_split.first,
-                    content: file.xpath('text()').first.content,
-                    read_only: false,
-                    hidden: file_class == 'internal',
-                    role: role,
-                    feedback_message: role == 'teacher_defined_test' ? feedback_message_nodes.first.content : nil,
-                    file_type: FileType.find_by(
-                      file_extension: ".#{file_name_split.second}"
-                    ),
+        content: file.xpath('text()').first.content,
+        read_only: false,
+        hidden: file_class == 'internal',
+        role: role,
+        feedback_message: role == 'teacher_defined_test' ? feedback_message_nodes.first.content : nil,
+        file_type: FileType.find_by(
+          file_extension: ".#{file_name_split.second}"
+        ),
       })
     end
     self.execution_environment_id = 1

app/models/exercise_tip.rb

@@ -14,8 +14,8 @@ class ExerciseTip < ApplicationRecord
   def tip_chain?
     # Ensure each referenced parent exercise tip is set for this exercise
     unless ExerciseTip.exists?(
-exercise: exercise, id: parent_exercise_tip
-)
+      exercise: exercise, id: parent_exercise_tip
+    )
       errors.add :parent_exercise_tip,
         I18n.t('activerecord.errors.messages.together',
           attribute: I18n.t('activerecord.attributes.exercise_tip.tip'))

app/models/proxy_exercise.rb

@@ -58,7 +58,7 @@ class ProxyExercise < ApplicationRecord
           exercises.where('expected_difficulty > 1').sample # difficulty should be > 1 to prevent dummy exercise from being chosen.
         end
       user.user_proxy_exercise_exercises << UserProxyExerciseExercise.create(user: user,
-exercise: matching_exercise, proxy_exercise: self, reason: @reason.to_json)
+        exercise: matching_exercise, proxy_exercise: self, reason: @reason.to_json)
       matching_exercise
     end
   end

app/models/structured_error_attribute.rb

@@ -11,6 +11,6 @@ class StructuredErrorAttribute < ApplicationRecord
       value = result.captures[0]
     end
     create(structured_error: structured_error, error_template_attribute: attribute, value: value,
-match: !result.nil?)
+      match: !result.nil?)
   end
 end