fix: handle newlines in autocomplete suggestions

[eero-lehtinen]

Fixes #109

Escapes newlines in autocomplete to avoid errors.

Now doesn't error (second item has newlines):

[Saghen]

Thanks! Do me a favor and add a small comment above that line explaining why. Also, maybe create a new field on the context called label with the fix and leave the item as-is

[Saghen]

Thank you!