Deprecate full_url_for_element helper

Please implement your own unique DOM ID for your elements and
pass it as anchor to your URLs.

app/helpers/alchemy/url_helper.rb

@@ -20,7 +20,7 @@ def show_alchemy_page_url(page, optional_params = {})
     def show_page_path_params(page, optional_params = {})
       raise ArgumentError, "Page is nil" if page.nil?
 
-      url_params = {urlname: page.urlname}.update(optional_params)
+      url_params = { urlname: page.urlname }.update(optional_params)
       prefix_locale? ? url_params.update(locale: page.language_code) : url_params
     end
 
@@ -35,8 +35,11 @@ def download_alchemy_attachment_url(attachment)
     end
 
     # Returns the full url containing host, page and anchor for the given element
+    # @deprecated
     def full_url_for_element(element)
       "#{current_server}/#{element.page.urlname}##{element.dom_id}"
     end
+
+    deprecate :full_url_for_element, deprecator: Alchemy::Deprecation
   end
 end

spec/helpers/alchemy/url_helper_spec.rb

@@ -141,6 +141,12 @@ module Alchemy
     end
 
     describe "#full_url_for_element" do
+      around do |example|
+        Alchemy::Deprecation.silence do
+          example.run
+        end
+      end
+
       subject { full_url_for_element(element) }
 
       let(:element) { create(:alchemy_element, name: "headline") }