Replaces use Gettext with use GettextSigils in modules that use a Gettext backend
use Gettext
use GettextSigils
Finds all modules containing use Gettext, backend: MyApp.Gettext and replaces them with use GettextSigils, backend: MyApp.Gettext
use Gettext, backend: MyApp.Gettext
use GettextSigils, backend: MyApp.Gettext
mix gettext_sigils.install