How to display data using has_many belongs_to binding methods?

Question

Ruby on Rails

There are models:
User has_many tests
Test belongs_to User
There is a /users/index page where user cards are displayed.
To display information from the tests table, I use

<% @users.each do |user| %>
  <%= user.tests.each do |f| %> 
    <%= f.title %>
  <% end %>
<% end %>

Everything is displayed perfectly, except for an extra trailer in the form of:

[#<Test id: 1, title: "number 1", describe: " blablabla", 
user_id: 1, created_at: "2014-12-10 13:22:15", 
updated_at: "2014-12-10 13:22:15">]

Can you please tell me how to remove it? and where to read the theory why it is generated?
Thank you in advance.

Answer 1

<% @users.each do |user| %>
  <% user.tests.each do |f| %> 
    <%= f.title %>
  <% end %>
<% end %>

<% something %> - executes ruby ​​code
<%= something %> - outputs output
Read this:
stackoverflow.com/questions/7996695/what-is-the-di...

Answer 2

where is the excess output?
f.title what outputs?