isssue #447 (#449)

package.json

@@ -2,7 +2,7 @@
   "name": "azure-iot-edge",
   "displayName": "Azure IoT Edge",
   "description": "Develop, deploy, debug, and manage your IoT Edge solution",
-  "version": "1.13.0-rc2",
+  "version": "1.13.0-rc3",
   "publisher": "vsciot-vscode",
   "aiKey": "95b20d64-f54f-4de3-8ad5-165a75a6c6fe",
   "icon": "logo.png",

src/common/utility.ts

@@ -294,8 +294,9 @@ export class Utility {
         }
     }
 
-    // Remove the wrapping "${" and "}" of a image placeholder
+    // Escape JSON string and remove the wrapping "${" and "}" of a image placeholder
     public static unwrapImagePlaceholder(imagePlaceholder: string): string {
+        imagePlaceholder = JSON.stringify(imagePlaceholder).slice(1, -1);
         if (imagePlaceholder.search(Constants.imagePlaceholderPattern) === 0 && imagePlaceholder.endsWith("}")) {
             return imagePlaceholder.slice(2, -1);
         }