Fix typo in shell-local command example

website/source/docs/provisioners/shell-local.html.markdown

@@ -39,7 +39,7 @@ Required:
 Optional parameters:
 
 -   `execute_command` (array of strings) - The command to use to execute
-    the script. By default this is `["/bin/sh", "-c", "{{.Command}"]`. The value
+    the script. By default this is `["/bin/sh", "-c", "{{.Command}}"]`. The value
     is an array of arguments executed directly by the OS. The value of this is
     treated as [configuration
     template](/docs/templates/configuration-templates.html). The only available