title: No UTF-8 / Polish characters in R console
body: <p>The Polish characters are not appearing properly in the R console.</p>
  
  <pre><code>&gt; a &lt;- "Wrocław"
  &gt; a
  [1] "Wroclaw"
  </code></pre>
  
  <p>This is with the following default locale settings:</p>
  
  <pre><code>&gt; Sys.getlocale()
  [1] "LC_COLLATE=English_United States.1252;LC_CTYPE=English_United States.1252;LC_MONETARY=English_United States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252"
  </code></pre>
  
  <p>After running this:</p>
  
  <pre><code>Sys.setlocale("LC_ALL", "Polish")
  </code></pre>
  
  <p>I get this:</p>
  
  <pre><code>&gt; a &lt;- "Wrocław"
  &gt; a
  [1] "Wroc³aw"
  </code></pre>
  
  <p>Apparently, something is wrong with my locale setup. How do I fix it?</p>
  
  <p>My environment: R: 3.4.0 / Rstudio: 1.0.143 / OS: Windows 10</p>