I reviewed the patch.
If you see the module, the description is a configurabl...

I reviewed the patch.

If you see the module, the description is a configurable field "admin/config/regional/unix-time-conversion/settings". And it looks like patch won't cover the use case when the description is configured as a long text.

Ex,

Ex: 1467504000 Lorem ipsum Lorem ipsum Lorem ipsum Lorem ipsum Lorem ipsum Lorem ipsum Lorem ipsum

Long text like this won't look good as a placeholder due to which I think we should keep description as it is displayed presently.