aruba tests should use backticks

[robdodson]

I found that whenever I tried running the cucumber/aruba tests that I got a warning informing me to use the backticks method instead of double quotes. I think test should look like this:

Scenario: Broccoli is gross When I run foodie portray broccoli Then the output should contain "Gross!"

Scenario: Tomato, or Tomato? When I run foodie pluralize --word Tomato Then the output should contain "Tomatoes"