i have listed my _form.html.erb file below what i would like to do is change the text on the submit button i know how to do it in html but not shure how to do it in Rails 3<
Sometimes using helpers is not acceptable because of used text or you need additionally add class etc., so you can directly override value:
<%= f.submit class: 'btn btn-primary', value: 'Login' %>
or:
<%= f.button :submit, class: 'btn btn-primary', value: 'Login' %>
By the way it was mentioned by @cassi.lup in comment to accepted answer.
Tested on Rails 4.2.3.