[TldrTechBridge] Fix duplicate entries and empty sections (#4466)

Author: SqrtMinusOne

bridges/TldrTechBridge.php

@@ -57,6 +57,9 @@ public function collectData()
                 continue;
             }
             $itemUrl = Url::fromString(self::URI . ltrim($child->href, '/'));
+            if ($itemUrl == $locationUrl) {
+                continue;
+            }
             $this->extractItem($itemUrl);
             if (count($this->items) >= $limit) {
                 break;
@@ -125,6 +128,11 @@ private function extractContent($url)
                 }
             }
         }
+        foreach ($content->find('section') as $section) {
+            if (count($section->children()) == 0) {
+                $content->removeChild($section);
+            }
+        }
         $title = $content->find('h2', 0);
         return [$content->innertext, $title->plaintext];
     }