Apply manual rubocop fixes

db/seeds/fibonacci/exercise.rb

@@ -1,3 +1,3 @@
 # frozen_string_literal: true
 
-def fibonacci(n); end
+def fibonacci(number); end

db/seeds/fibonacci/exercise_spec_3.rb

@@ -4,11 +4,11 @@ require './exercise'
 require './reference'
 
 describe '#fibonacci' do
-  SAMPLE_COUNT = 32
+  let(:sample_count) { 32 }
 
   let(:reference) { Class.new.extend(Reference) }
 
-  SAMPLE_COUNT.times do |i|
+  sample_count.times do |i|
     instance_eval do
       it "obtains the correct result for input #{i}" do
         expect(fibonacci(i)).to eq(reference.fibonacci(i))

db/seeds/fibonacci/reference.rb

@@ -1,7 +1,7 @@
 # frozen_string_literal: true
 
 module Reference
-  def fibonacci(n)
-    n < 2 ? n : fibonacci(n - 1) + fibonacci(n - 2)
+  def fibonacci(number)
+    number < 2 ? number : fibonacci(number - 1) + fibonacci(number - 2)
   end
 end

db/seeds/hello_world/exercise.rb

@@ -0,0 +1,3 @@
+# frozen_string_literal: true
+
+# Write your code here

db/seeds/production.rb

@@ -29,7 +29,7 @@ FileType.create_factories
 
 # change all resources' author
 [ExecutionEnvironment, Exercise, FileType].each do |model|
-  model.update_all(user_id: InternalUser.first.id)
+  model.update(user_id: InternalUser.first.id)
 end
 
 # delete temporary users

db/seeds/sql_select/comparator.rb

@@ -10,5 +10,7 @@ database = SQLite3::Database.new('/database.db')
 missing_tuples = database.execute(REFERENCE_QUERY) - database.execute(STUDENT_QUERY)
 unexpected_tuples = database.execute(STUDENT_QUERY) - database.execute(REFERENCE_QUERY)
 
+# rubocop:disable Rails/Output
 puts("Missing tuples: #{missing_tuples}")
 puts("Unexpected tuples: #{unexpected_tuples}")
+# rubocop:enable Rails/Output

db/seeds/tdd/exercise.rb

@@ -0,0 +1,3 @@
+# frozen_string_literal: true
+
+# Write your code here