Fixed Hoogle engine (#3146)

searx/settings.yml

@@ -690,22 +690,19 @@ engines:
 
   - name : hoogle
     engine : xpath
-    paging : True
     search_url : https://hoogle.haskell.org/?hoogle={query}&start={pageno}
     results_xpath : '//div[@class="result"]'
-    title_xpath : './/div[@class="ans"]//a'
-    url_xpath : './/div[@class="ans"]//a/@href'
-    content_xpath : './/div[@class="from"]'
-    page_size : 20
+    title_xpath : './div[@class="ans"]'
+    url_xpath : './div[@class="ans"]//a/@href'
+    content_xpath : './div[contains(@class, "doc")]'
     categories : it
     shortcut : ho
     about:
-      website: https://www.haskell.org/
+      website: https://hoogle.haskell.org/
       wikidata_id: Q34010
-      official_api_documentation: https://hackage.haskell.org/api
       use_official_api: false
       require_api_key: false
-      results: JSON
+      results: HTML
 
   - name : imdb
     engine : imdb