Multi-line command editing does not work in the demo site

[brlin-tw]

Steps to reproduce

1. Open the https://justbash.dev/ page.

2. In the command prompt, type:

   for file in *; do

3. Press ENTER.

Current behavior

The following error returned:

```text
bash: syntax error: Parse error at 1:18: Expected DONE, got EOF
```

Expected behavior

No errors returned and the secondary prompt(PS2) appears:

```text
$ for file in *; do
> 
```

as in the regular Bash shell.

Additional info

When the multi-line command is pasted in the problem is not reproduced:

$ for file in *; do
    echo "${file}"
done
AGENTS.md
LICENSE
README.md
bash-tool
dirs
just-bash
package.json
wtf-is-this.md