anchor.diff:            <input type="hidden" name="_method" value="patch">
             <input type="number" name="amount">
             <input type="submit" value="Buy">
  -          <br><em>($<%= @land_price %>/mi<sup>2</sup>)</em>
  +          <br><em>($<%= @land_price %> per mi<sup>2</sup>)</em>
           </form>
         </td>
       </tr>
  
positive.code:           <input type="hidden" name="_method" value="patch">
            <input type="number" name="amount">
            <input type="submit" value="Invite farmers">
            <br><em>(1 hut needed for every 10 farmers)</em>
          </form>
        </td>
      </tr>
  
negative.code:             <input type="hidden" name="_method" value="patch">
              <input type="number" name="amount">
              <input type="submit" value="Enlist warriors">
              <br><em>($<%= @warrior_price %> per warrior)</em>
            </form>
          <% end %>
        </td>
  