```ruby
require 'spec_helper'

describe SearchReferencesController, 'GET to #show', type: :controller do
  render_views

  around do |example|
    VCR.use_cassette('a_z_index#show_m') do
      example.yield
    end
  end

  before {
    get :show, letter: 'm'
  }

  it 'renders links to relevant headings' do
    expect(response.body).to include 'Mace'
    expect(response.body).to include '/headings/0908'
  end

  it 'renders links to relevant chapters' do
    expect(response.body).to include 'Melons'
    expect(response.body).to include '/chapters/08'
  end

  it 'renders links to relevant sections' do
    expect(response.body).to include 'Machine Tools'
    expect(response.body).to include '/sections/16'
  end

  it 'renders links to relevant commodities' do
    expect(response.body).to include 'Mtest'
    expect(response.body).to include '/commodities/010121000'
  end
end
```

Fix SearchReferencesController specs to run
user
```ruby
require 'spec_helper'

describe SearchReferencesController, 'GET to #show', type: :controller do
  render_views

  around(:each) do |example|
    VCR.use_cassette('a_z_index#show_m') do
      example.run
    end
  end

  before {
    get :show, letter: 'm'
  }

  it 'renders links to relevant headings' do
    expect(response.body).to include 'Mace'
    expect(response.body).to include '/headings/0908'
  end

  it 'renders links to relevant chapters' do
    expect(response.body).to include 'Melons'
    expect(response.body).to include '/chapters/08'
  end

  it 'renders links to relevant sections' do
    expect(response.body).to include 'Machine Tools'
    expect(response.body).to include '/sections/16'
  end

  it 'renders links to relevant commodities' do
    expect(response.body).to include 'Mtest'
    expect(response.body).to include '/commodities/010121000'
  end
end
```
assistant