Ruby on Rails CSV putting "" instead of actual quotes

I am attempting to generate a CSV file. Everything is fine except for blank fields, I'm not quite sure have "" instead of actual quotes. I've provided the code I'm using to generate the file and some output.

<% headers = ["Username", "Name", "E-mail", "Phone Number"] %>
<%= CSV.generate_line headers %>

<% @users_before_paginate.each do |user| %>
  <% row = [ "#{user.username}".html_safe ] %>
  <% row << "#{user.profile.first_name} #{user.profile.last_name}".html_safe unless user.profile.blank? %>
  <% row << "#{user.email}".html_safe unless user.profile.nil? %>
  <% row << "#{user.profile.phone}".html_safe unless user.profile.nil? %>
  <%= CSV.generate_line row %>
<% end %>

Output

Username,Name,E-mail,Phone Number

  admin,LocalShopper ,shoplocally1@gmail.com,""
  Brian,Oliveri Design ,brian@oliveridesign.com,727-537-9617
  LocalShopperJenn,Jennifer M Gentile ,localshopperjenn@hotmail.com,""