fix: add fallback for completion label details

Author: ahlinc

crates/ide-completion/src/item.rs

@@ -26,7 +26,7 @@ use crate::{
 pub struct CompletionItem {
     /// Label in the completion pop up which identifies completion.
     pub label: SmolStr,
-    /// Addition label details in the completion pop up that are
+    /// Additional label details in the completion pop up that are
     /// displayed and aligned on the right side after the label.
     pub label_detail: Option<SmolStr>,
 

crates/rust-analyzer/src/lsp/to_proto.rs

@@ -304,6 +304,8 @@ fn completion_item(
             detail: item.label_detail.as_ref().map(ToString::to_string),
             description: lsp_item.detail.clone(),
         });
+    } else if let Some(label_detail) = item.label_detail {
+        lsp_item.label.push_str(label_detail.as_str());
     }
 
     set_score(&mut lsp_item, max_relevance, item.relevance);