Fix RuboCop offense Rails/RootPublicPath (#37248).

git-svn-id: https://svn.redmine.org/redmine/trunk@21633 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/redmine/plugin_loader.rb

@@ -88,7 +88,7 @@ module Redmine
 
     # Absolute path to the plublic directory where plugins assets are copied
     cattr_accessor :public_directory
-    self.public_directory = Rails.root.join('public/plugin_assets')
+    self.public_directory = Rails.public_path.join('plugin_assets')
 
     def self.create_assets_reloader
       plugin_assets_dirs = {}

lib/redmine/wiki_formatting/common_mark/helper.rb

@@ -26,7 +26,7 @@ module Redmine
           help_file = "/help/#{current_language.to_s.downcase}/wiki_syntax_common_mark.html"
           # fall back to the english help page if there is none for the current
           # language
-          unless File.readable? Rails.root.join("public", help_file)
+          unless File.readable? Rails.public_path.join(help_file)
             help_file = "/help/en/wiki_syntax_common_mark.html"
           end
           url = "#{Redmine::Utils.relative_url_root}#{help_file}"