Update private repo methods

Use the "newer" style of declaring private and make update_repo_info public

Author: schneems

app/models/repo.rb

@@ -223,31 +223,29 @@ def self.find_by_full_name(full_name)
     Repo.find_by!(full_name: full_name)
   end
 
-  private
-
   def update_repo_info!
     UpdateRepoInfoJob.perform_later(self)
   end
 
-  def downcase_name
+  private def downcase_name
     self.name.downcase!
     self.user_name.downcase!
   end
 
-  def set_full_name!
+  private def set_full_name!
     if self.full_name && user_name.blank?
       self.user_name, self.name = self.full_name.split("/")
     else
       self.full_name = "#{user_name}/#{name}"
     end
   end
 
-  def strip_whitespaces
+  private def strip_whitespaces
     self.name.strip!
     self.user_name.strip!
   end
 
-  def github_url_exists
+  private def github_url_exists
     if issues_fetcher.error?
       errors.add(
         :expiration_date,