Auto merge of #13017 - Veykril:vscode-diag-workaround, r=Veykril

Pad empty diagnostic messages in relatedInformation as well

Follw up to https://github.com/rust-lang/rust-analyzer/pull/13016

editors/code/src/client.ts

@@ -111,6 +111,13 @@ export async function createClient(
                     if (!diagnostic.message) {
                         diagnostic.message = " ";
                     }
+                    if (diagnostic.relatedInformation) {
+                        for (const relatedInformation of diagnostic.relatedInformation) {
+                            if (!relatedInformation.message) {
+                                relatedInformation.message = " ";
+                            }
+                        }
+                    }
                 }
                 next(uri, diagnostics);
             },