Merge branch 'dev/bemcmorr/warn-no-examples' of https://github.com/microsoft/vscode-arduino into dev/bemcmorr/warn-no-examples

Author: benmcmorran

src/serialmonitor/serialMonitor.ts

@@ -144,7 +144,9 @@ export class SerialMonitor implements vscode.Disposable {
             this.updatePortStatus(true);
         } catch (err) {
             Logger.warn("Serial Monitor failed to open");
-            vscode.window.showErrorMessage(`Error opening serial port: ${err.toString()}`);
+            if (err.message) {
+                vscode.window.showErrorMessage(`Error opening serial port: ${err.message}`);
+            }
         }
     }