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  Be sure to have a copy of the Bootstrap stylesheet available on your
  application, you can get it on http://getbootstrap.com/.

  Inside your views, use the 'simple_form_for' with one of the Bootstrap form
  classes, '.form-horizontal' or '.form-inline', as the following:

    = simple_form_for(@user, html: { class: 'form-horizontal' }) do |form|

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