title: R console doesn't display unicode in a correct form
body: <p>Our teacher asked us to use kable() function when finishing our data analysis problem. However, when I run the sample code the teacher provided, the unicode seems doesn't display correctly:</p>
  
  <p>The sample code is the following:</p>
  
  <pre><code>n &lt;- 100
  x &lt;- rnorm(n)
  y &lt;- 2*x + rnorm(n)
  out &lt;- lm(y ~ x)
  library(knitr)
  kable(summary(out)$coef,digits=2)
  </code></pre>
  
  <p>And the R console returns me the following graph:</p>
  
  <pre><code>|            | Estimate| Std. Error| t value| Pr(&gt;&amp;#124;t&amp;#124;)|
  |:-----------|--------:|----------:|-------:|------------------:|
  |(Intercept) |    -0.07|       0.09|   -0.79|               0.43|
  |x           |     2.05|       0.09|   22.81|               0.00|
  </code></pre>
  
  <p>The correct form of the last column should be <strong>Pr(>&#124;t&#124;)</strong> instead. </p>
  
  <p>However, if change my code to:</p>
  
  <pre><code>kable(summary(out)$coef, format="latex",digits=2)
  </code></pre>
  
  <p>The returned result is:</p>
  
  <pre><code>\begin{tabular}{l|r|r|r|r}
  \hline
    &amp; Estimate &amp; Std. Error &amp; t value &amp; Pr(&gt;|t|)\\
  \hline
  (Intercept) &amp; -0.07 &amp; 0.09 &amp; -0.79 &amp; 0.43\\
  \hline
  x &amp; 2.05 &amp; 0.09 &amp; 22.81 &amp; 0.00\\
  \hline
  \end{tabular}
  </code></pre>
  
  <p>I suspect the problem is with the markdown system on my computer. Do anyone know how to fix this problem?</p>