fix: make semicolon optional when detecting prerender option

[ematipico]

Changes

Closes #11283

Testing

I tested it locally in a project of mine and it worked.

Existing CI should pass

Docs

N/A

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[bluwy]

This doesn't fix the repro for me, the problem is that the file is saved with CRLF endings, so the array after it's split by the regex looks like this:

[
  'false\r',
  'export async function POST({ request }) {\r',
  "  console.log('POST REQUEST')",
  '\r',
  '\r',
  '  const form = await request.formData()',
  '\r',
  '\r',
  "  return new Response(JSON.stringify({ message: 'hello world' }))",
  '\r',
  '}'
]

Adding a trailing .trim() to remove that \r fixes it instead.

[bluwy]

We should also clarify that this is related to CRLF line endings.