remove unnecessary escape character

Signed-off-by: Seyed Mohammad Mahdi Hatami <[email protected]>

lib/handlebars/runtime.js

@@ -376,7 +376,7 @@ export function invokePartial(partial, context, options) {
   }
 
   if (partial === undefined) {
-    throw new Exception('The partial \"' + options.name + '\" could not be found');
+    throw new Exception('The partial "' + options.name + '" could not be found');
   } else if (partial instanceof Function) {
     return partial(context, options);
   }