Use early return in rendering completion doc

helix-term/src/ui/completion.rs

@@ -381,7 +381,10 @@ impl Component for Completion {
         self.popup.render(area, surface, cx);
 
         // if we have a selection, render a markdown popup on top/below with info
-        if let Some(option) = self.popup.contents().selection() {
+        let option = match self.popup.contents().selection() {
+            Some(option) => option,
+            None => return,
+        };
         // need to render:
         // option.detail
         // ---
@@ -481,4 +484,3 @@ impl Component for Completion {
         markdown_doc.render(area, surface, cx);
     }
 }
-}