Fix Rails/CompactBlank cop (#24690)

app/models/concerns/attachmentable.rb

@@ -46,7 +46,7 @@ module Attachmentable
   def set_file_extension(attachment) # rubocop:disable Naming/AccessorMethodName
     return if attachment.blank?
 
-    attachment.instance_write :file_name, [Paperclip::Interpolations.basename(attachment, :original), appropriate_extension(attachment)].delete_if(&:blank?).join('.')
+    attachment.instance_write :file_name, [Paperclip::Interpolations.basename(attachment, :original), appropriate_extension(attachment)].compact_blank!.join('.')
   end
 
   def check_image_dimension(attachment)

app/models/poll.rb

@@ -101,7 +101,7 @@ class Poll < ApplicationRecord
   end
 
   def prepare_options
-    self.options = options.map(&:strip).reject(&:blank?)
+    self.options = options.map(&:strip).compact_blank
   end
 
   def reset_parent_cache

app/models/user.rb

@@ -445,7 +445,6 @@ class User < ApplicationRecord
     return if chosen_languages.nil?
 
     chosen_languages.compact_blank!
-
     self.chosen_languages = nil if chosen_languages.empty?
   end