Ruby on Rails

Why the string interpolation is not working inside the Nokogiri method
`#search` ?

require 'nokogiri'

doc = Nokogiri::HTML::Document.parse <<-eotl
<div>
<p>foo</p>
<p>foo</p>
<p>bar</p>
</div>
eotl

doc.class # => Nokogiri::HTML::Document

class Person
attr_accessor :name
end

ram = Person.new
ram.name="foo"
ram.name # => "foo"
doc.search('//div/p[text()= "#{ram.name}"]').to_a.size
# => 0

Where am I doing wrong ? please help!

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