title: Cannot resolve string supplied to vararg parameter in extension function
body: <p><strong>strings.xml</strong></p>
  
  <pre><code>&lt;string name="my_string"&gt;Showing your number: %1$s&lt;/string&gt;
  </code></pre>
  
  <p><strong>ActivityExt.kt</strong></p>
  
  <pre><code>fun Activity.showToast(textResId: Int, vararg formatArgs: String) {
      val text = getString(textResId, formatArgs)
      Toast.makeText(this, text, Toast.LENGTH_SHORT).show()
  }
  </code></pre>
  
  <p><strong>MainActivity.kt</strong></p>
  
  <pre><code>val number = 11
  showToast(R.string.my_string, number.toString())
  </code></pre>
  
  <p>Toast with following text is showing:</p>
  
  <pre><code>Showing your number: [Ljava.lang.String;@2cfa3b]
  </code></pre>
  
  <p>Why this happens?</p>