No offset in form_group classes without label when multiple cols values are specified

[0x0badc0de]

Example:

<%= bootstrap_form_with(model: foo, layout: :horizontal, label_col: "col-sm-4 col-md-2", control_col: "col-sm-8 col-md-10") do |form| %>
  <%= form.form_group do %>
    <%= form.submit %>
  <% end %>
<% end %>

Resulting div for form_group will have class="col-sm-8 col-md-10 col-sm-4 col-md-2". While expected one is class="col-sm-8 col-md-10 offset-sm-4 offset-md-2"
Probably pattern in offset_col should be updated to something like /\bcol-(\w+)-(\d)\b/ and sub replaced with gsub.

[lcreid]

Great catch! Thanks for the feedback. Would you like to submit a PR to fix this? We're happy to take contributions from the community. If you don't want to submit a PR, just tell us and we'll fix it.