title: rpart.plot remove scientific notation
body: <pre><code>&gt; fit &lt;- rpart(price ~ carat + cut + clarity, diamonds_train, method = "anova")
  
  &gt; rpart.plot(fit, type = 4, extra = 101)
  </code></pre>
  
  <p>I tried <code>options(scipen=10)</code> but it didn't work. How can I remove the scientific notation?</p>
  
  <p><img src="https://i.stack.imgur.com/CHxF1.png" alt="enter image description here"></p>