Should raise error when options[:raise] is true

Before ec16ba75a5493b9da972eea08bae630eba35b62f, 
ActionView::Helpers::TranslationHelper#translate has raised errors with 
specifying options[:raise] to true.

This should work by this fix:

    begin
     t(:"translations.missing", raise: true)
   rescue I18n::MissingTranslationData
     p :hello!
   end