zsh: noglob option, in action. Rake tasks can take arguments in hard brackets. These brackets have special meaning in zsh. So, either turn off the special expansion stuff (noglob) or escape the brackets.

gistfile1.txt

zsh: Too helpful. Turn off the extra features, so that you can run commands:

  $ noglob foreman run -f Procfile.dev rake coupons:seed[1,"One year"]
  $ rund rake coupons:seed\[1,"One year"\]

Oh, 'rund' is an alias:

  $ alias |grep rund
rund='foreman run -f Procfile.dev'
runt='rund -e .env_test'

For Heroku this is the way you make it work:
heroku run "rake coupons:seed[500,'Three months']" -a ranktrail