content: Replace calls to the code shortcode with fenced code blocks

content/en/methods/shortcode/Position.md

@@ -11,14 +11,14 @@ params:
 
 The `Position` method is useful for error reporting. For example, if your shortcode requires a "greeting" argument:
 
-{{< code file=layouts/shortcodes/myshortcode.html >}}
+```go-html-template {file="layouts/shortcodes/myshortcode.html"}
 {{ $greeting := "" }}
 {{ with .Get "greeting" }}
   {{ $greeting = . }}
 {{ else }}
   {{ errorf "The %q shortcode requires a 'greeting' argument. See %s" .Name .Position }}
 {{ end }}
-{{< /code >}}
+```
 
 In the absence of a "greeting" argument, Hugo will throw an error message and fail the build: