Name in Sendgrid Email with Rails - ruby-on-rails

Question

I'm using careerfoundry's tutorial on using Sendgrid to send emails with Heroku. I'm using their exact code for the user mailer and thank_you action in the pages controller. This code is working for the most part. The issue is that the subject line I receive in my inbox is this:
A new contact form message from #{name}
User_Mailer.rb
class UserMailer < ActionMailer::Base
default from: "from#example.com"
def contact_form(email, name, message)
#message = message
mail(:from => email,
:to => 'your-email#example.com',
:subject => "A new contact form message from #{name}")
end
end
Contact Form
<%= form_tag("/thank_you") do %>
<div class="row">
<div class="col-md-4">
<div class="input-group">
<%= text_field_tag :name, nil, class: 'form-control', placeholder: 'Name' %>
</div>
</div>
<div class="col-md-8">
<div class="input-group">
<span class="input-group-addon" id="basic-addon1">#</span>
<%= text_field_tag :email, nil, class: 'form-control', placeholder: 'Email' %>
</div>
</div>
</div>
<br>
<div class="row">
<div class="col-md-12">
<div class="input-group text-area-wide">
<%= text_area_tag :message, nil, class: 'form-control text-area-wide', placeholder: 'Message' %>
</div>
</div>
</div>
<br>
<%= submit_tag 'Send Message', class: 'btn btn-success' %>
<% end %>
Pages Controller
def thank_you
#name = params[:name]
#email = params[:email]
#message = params[:message] || "Hello!"
# Only try to send this email on a POST
# if request.post?
# or make a feedback form controller and send in the create action
# ActionMailer::Base.mail( FOR TEST PURPOSES
# :from => #email,
# :to => 'erikvdw#comcast.net',
# :subject => "A new contact form message from #{#name}",
# :body => #message).deliver
UserMailer.contact_form(#email, #name, #message).deliver
end

Answer 1

A quick fix would be to just split the string into two parts as such
class UserMailer < ActionMailer::Base
default from: "from#example.com"
def contact_form(email, name, message)
#message = message
mail(:from => email,
:to => 'your-email#example.com',
:subject => "A new contact form message from " + name) <----
end
end
This way the notation is clearer and it will avoid the manual concatenation problem.
After looking up a quick thing, it seems like this might also work. The single quotes are needed internally apparently according to a couple sources I found. I don't use that notation so let me know if it helped!
:subject => "A new contact form message from '#{name}'")