class Sass::Tree::Visitors::Perform

def run_interp_no_strip(text)
  text.map do |r|
    next r if r.is_a?(String)
    val = r.perform(@environment)
    # Interpolated strings should never render with quotes
    next val.value if val.is_a?(Sass::Script::Value::String)
    val.to_s
  end.join
end