fix: apply Inspectors to Generated Pages as well

**Breaking change from beta2**

bridgetown-builder/lib/bridgetown-builder/dsl/inspectors.rb

@@ -20,7 +20,7 @@ module HTML
           # Are there inspectors available? Is it an .htm* file?
           def self.can_run?(resource, inspectors)
             inspectors &&
-              resource.destination&.output_ext&.starts_with?(".htm") &&
+              resource.output_ext&.starts_with?(".htm") &&
               !resource.data.bypass_inspectors
           end
 
@@ -42,7 +42,7 @@ def self.call(resource, inspectors)
         module XML
           # Strip the resource's initial extension dot. `.rss` => `rss`
           def self.resource_ext(resource)
-            resource.destination&.output_ext&.delete_prefix(".")
+            resource.output_ext&.delete_prefix(".")
           end
 
           # Are there any inspectors available which match the resource extension?
@@ -103,6 +103,12 @@ def inspect_html(&block)
 
               resource.output = Inspectors.process_html(resource, @_html_inspectors)
             end
+
+            hook :generated_pages, :post_render do |page|
+              next unless HTML.can_run?(page, @_html_inspectors)
+
+              page.output = Inspectors.process_html(page, @_html_inspectors)
+            end
           end
 
           @_html_inspectors << block
@@ -123,6 +129,12 @@ def inspect_xml(extension = "xml", &block)
 
               resource.output = Inspectors.process_xml(resource, @_xml_inspectors)
             end
+
+            hook :generated_pages, :post_render do |page|
+              next unless Inspectors::XML.can_run?(page, @_xml_inspectors)
+
+              page.output = Inspectors.process_xml(page, @_xml_inspectors)
+            end
           end
 
           (@_xml_inspectors[extension.to_s] ||= []).tap do |arr|

bridgetown-core/lib/bridgetown-core/resource/base.rb

@@ -181,6 +181,11 @@ def id
         model.origin.id
       end
 
+      # @return [String]
+      def output_ext
+        destination&.output_ext
+      end
+
       def date
         data["date"] ||= site.time
       end