Include declarations for undocumented symbols

Always show the declaration if we know it.
If we don't have a declaration then make sure mustache
knows we don't want the one belonging to the parent.

CHANGELOG.md

@@ -18,6 +18,10 @@
   [John Fairhurst](https://github.com/johnfairh)
   [#894](https://github.com/realm/jazzy/issues/894)
 
+* Always display correct declaration for undocumented symbols.  
+  [John Fairhurst](https://github.com/johnfairh)
+  [#864](https://github.com/realm/jazzy/issues/864)
+
 ## 0.8.4
 
 ##### Breaking

lib/jazzy/doc_builder.rb

@@ -307,7 +307,7 @@ def self.gh_token_url(item, source_module)
     def self.render_item(item, source_module)
       # Combine abstract and discussion into abstract
       abstract = (item.abstract || '') + (item.discussion || '')
-      item_render = {
+      {
         name:                       item.name,
         abstract:                   abstract,
         declaration:                item.declaration,
@@ -323,7 +323,6 @@ def self.render_item(item, source_module)
         start_line:                 item.start_line,
         end_line:                   item.end_line,
       }
-      item_render.reject { |_, v| v.nil? }
     end
 
     def self.make_task(mark, uid, items)

lib/jazzy/sourcekitten.rb

@@ -306,10 +306,6 @@ def self.parameters(doc, discovered)
     def self.make_doc_info(doc, declaration)
       return unless should_document?(doc)
 
-      unless doc['key.doc.full_as_xml']
-        return process_undocumented_token(doc, declaration)
-      end
-
       declaration.declaration = Highlighter.highlight(
         doc['key.parsed_declaration'] || doc['key.doc.declaration'],
         Config.instance.objc_mode ? 'objc' : 'swift',
@@ -320,6 +316,10 @@ def self.make_doc_info(doc, declaration)
         )
       end
 
+      unless doc['key.doc.full_as_xml']
+        return process_undocumented_token(doc, declaration)
+      end
+
       declaration.abstract = Markdown.render(doc['key.doc.comment'] || '')
       declaration.discussion = ''
       declaration.return = Markdown.rendered_returns