cuelang.org: preprocessor strips author's shell line continuations from script blocks

[jpluscplusm]

What page were you looking at?

n/a

What version of the site were you looking at?

cue-lang/cuelang.org@f0e0f0f

What did you do?

I placed the following on a test page, and invoked the preprocessor:

{{{with script "en" "test"}}}
echo foo \
  bar \
  baz
{{{end}}}

What did you expect?

That the processed page inside the hugo/ hierarchy would have the line continuations presented on the page, and (possibly) available via the copy-this-command button.

What did you see instead?

```text { title="TERMINAL" type="terminal" codeToCopy="ZWNobyBmb28gYmFyIGJheg==" }
$ echo foo bar baz
foo bar baz
```