apply cookstyle fixes

Signed-off-by: Martin Schurz <Martin.Schurz@t-systems.com>

Author: schurzi

Rakefile

@@ -1,5 +1,4 @@
 #!/usr/bin/env rake
-# encoding: utf-8
 # frozen_string_literal: true
 
 require 'cookstyle'
@@ -51,5 +50,4 @@ task :changelog do
   Rake::Task[:changelog].execute
 rescue LoadError
   puts '>>>>> GitHub Changelog Generator not loaded, omitting tasks'
-
 end

controls/patches.rb

@@ -1,4 +1,3 @@
-# encoding: utf-8
 # frozen_string_literal: true
 
 # copyright: 2016, Christoph Hartmann

libraries/linux_updates.rb

@@ -1,4 +1,3 @@
-# encoding: utf-8
 # frozen_string_literal: true
 
 # copyright: 2016, Christoph Hartmann
@@ -49,7 +48,7 @@ def updates
   end
 
   def uptodate?
-    return nil if @update_mgmt.nil?
+    return if @update_mgmt.nil?
 
     u = @update_mgmt.updates
     return false if u.nil? || !u['available'].empty?
@@ -198,7 +197,6 @@ def debian_base
 
 class RHELUpdateFetcher < UpdateFetcher
   def packages
-    # rubocop:disable Style/FormatStringToken
     rhel_packages = <<~PRINT_JSON
       sleep 2 && echo " "
       echo -n '{"installed":['
@@ -207,7 +205,6 @@ def packages
       echo -n ']}'
     PRINT_JSON
     parse_json(rhel_packages)
-    # rubocop:enable Style/FormatStringToken
   end
 
   def updates
@@ -219,7 +216,7 @@ def updates
     unless cmd.exit_status.zero?
       # essentially we want https://github.com/chef/inspec/issues/1205
       warn 'Could not determine patch status.'
-      return nil
+      return
     end
 
     first = cmd.stdout.index('{')