Solve Rubocop RedundantInterpolation cops

.rubocop_todo.yml

@@ -810,13 +810,14 @@ Style/ClassAndModuleChildren:
     - 'lib/open_food_network/locking.rb'
     - 'spec/models/spree/payment_method_spec.rb'
 
-# Offense count: 1
+# Offense count: 2
 # This cop supports unsafe autocorrection (--autocorrect-all).
 # Configuration parameters: EnforcedStyle.
 # SupportedStyles: always, always_true, never
 Style/FrozenStringLiteralComment:
   Exclude:
     - '.simplecov'
+    - 'tmp/stimulus_reflex_installer/working/development.rb'
 
 # Offense count: 6
 # This cop supports unsafe autocorrection (--autocorrect-all).

lib/tasks/karma.rake

@@ -39,6 +39,6 @@ namespace :karma do
 
     I18n::JS::DEFAULT_EXPORT_DIR_PATH.replace('tmp/javascripts')
     I18n::JS.export
-    "#{Rails.root.join(I18n::JS::DEFAULT_EXPORT_DIR_PATH, 'translations.js')}"
+    Rails.root.join(I18n::JS::DEFAULT_EXPORT_DIR_PATH, 'translations.js').to_s
   end
 end

spec/base_spec_helper.rb

@@ -60,7 +60,7 @@ InvisibleCaptcha.timestamp_enabled = false
 
 RSpec.configure do |config|
   # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
-  config.fixture_path = "#{Rails.root.join('spec/fixtures')}"
+  config.fixture_path = Rails.root.join('spec/fixtures').to_s
 
   # If you're not using ActiveRecord, or you'd prefer not to run each of your
   # examples within a transaction, remove the following line or assign false