Fix most rubocop issues (#2165)

* Run rubocop --autocorrect on app/, config/ and lib/, also manually fix some remaining style issues

* Run rubocop --autocorrect-all on db/

* Run rubocop --autocorrect-all on `spec/` and fix remaining issues

app/services/post_status_service.rb

@@ -61,17 +61,22 @@ class PostStatusService < BaseService
 
   private
 
-  def preprocess_attributes!
-    if @text.blank? && @options[:spoiler_text].present?
-     @text = '.'
-     if @media&.find(&:video?) || @media&.find(&:gifv?)
-       @text = '📹'
-     elsif @media&.find(&:audio?)
-       @text = '🎵'
-     elsif @media&.find(&:image?)
-       @text = '🖼'
-     end
+  def fill_blank_text!
+    return unless @text.blank? && @options[:spoiler_text].present?
+
+    if @media&.any?(&:video?) || @media&.any?(&:gifv?)
+      @text = '📹'
+    elsif @media&.any?(&:audio?)
+      @text = '🎵'
+    elsif @media&.any?(&:image?)
+      @text = '🖼'
+    else
+      @text = '.'
     end
+  end
+
+  def preprocess_attributes!
+    fill_blank_text!
     @sensitive    = (@options[:sensitive].nil? ? @account.user&.setting_default_sensitive : @options[:sensitive]) || @options[:spoiler_text].present?
     @visibility   = @options[:visibility] || @account.user&.setting_default_privacy
     @visibility   = :unlisted if @visibility&.to_sym == :public && @account.silenced?