What does “<<-” mean in Ruby?

Question

For example:

code = <<-EOH
    bundle install
    bundle exec unicorn -c /etc/unicorn.cfg -D
EOH

What does this code do? What is

Answer 1

You can pass multiple commands in one block like this in Chef Recipe

   bash 'Install ftppwd' do
    code <<-EOH
   mkdir #{ftppwd_dir}
   chmod 775 #{ftppwd_dir}
   chgrp #{batch_id} #{ftppwd_dir}/*
   chown #{batch_id} #{ftppwd_dir}/*
   EOH